pandora-kernel.git
12 years agotarget: remove SCF_EMULATE_CDB_ASYNC
Christoph Hellwig [Thu, 3 Nov 2011 21:50:44 +0000 (17:50 -0400)]
target: remove SCF_EMULATE_CDB_ASYNC

All ->execute_task instances now need to complete the I/O explicitly,
which can either happen synchronously or asynchronously.

Note that a lot of the CDB emulations appear to return success even if
some lowlevel operations failed.  Given that this is an existing issue
this patch doesn't change that fact.

(nab: Adding missing switch breaks in PR-IN + PR_OUT)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: refactor transport_emulate_control_cdb
Christoph Hellwig [Thu, 3 Nov 2011 21:50:43 +0000 (17:50 -0400)]
target: refactor transport_emulate_control_cdb

Encapsulate each CDB emulation into a function of its own, to prepare
setting ->exectute_task to these routines.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: pass the se_task to the CDB emulation callback
Christoph Hellwig [Thu, 3 Nov 2011 21:50:42 +0000 (17:50 -0400)]
target: pass the se_task to the CDB emulation callback

We want to be able to handle all CDBs through it and remove hacks like
always using the first task in a CDB in target_report_luns.

Also rename the callback to ->execute_task to better describe its use.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: split core_scsi3_emulate_pr
Christoph Hellwig [Thu, 3 Nov 2011 21:50:41 +0000 (17:50 -0400)]
target: split core_scsi3_emulate_pr

Split core_scsi2_emulate_crh into one routine each for the
PERSISTENT_RESERVE_IN and PERSISTENT_RESERVE_OUT side.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: split core_scsi2_emulate_crh
Christoph Hellwig [Thu, 3 Nov 2011 21:50:40 +0000 (17:50 -0400)]
target: split core_scsi2_emulate_crh

Split core_scsi2_emulate_crh into one routine each for the reserve and
release side.  The common code now is in a helper called by both
routines.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Add generic active I/O shutdown logic
Nicholas Bellinger [Thu, 3 Nov 2011 04:52:08 +0000 (21:52 -0700)]
target: Add generic active I/O shutdown logic

This patch adds the initial pieces of generic active I/O shutdown logic.
This is intended to be a 'opt-in' feature for fabric modules that
includes the following functions to provide a mechinism for fabric
modules to track se_cmd via se_session->sess_cmd_list:

*) target_get_sess_cmd() - Add se_cmd to sess->sess_cmd_list, called
   from fabric module incoming I/O path.
*) target_put_sess_cmd() - Check for completion or drop se_cmd from
   ->sess_cmd_list
*) target_splice_sess_cmd_list() - Splice active I/O list from
   ->sess_cmd_list to ->sess_wait_list, can called with HW fabric
   lock held.
*) target_wait_for_sess_cmds() - Walk ->sess_wait_list waiting on
   individual ->cmd_wait_comp.  Optional transport_wait_for_tasks()
   call.

target_splice_sess_cmd_list() is allowed to be called under HW fabric
lock, and performs the splice into se_sess->sess_wait_list and set
se_cmd->cmd_wait_set.  Then target_wait_for_sess_cmds() walks the list
waiting for individual target_put_sess_cmd() fabric callbacks to
complete.

It also adds TFO->check_release_cmd() to split the completion and memory
release calls, where a fabric module uses target_put_sess_cmd() to check
for I/O completion during session shutdown.  This is currently pushed out
into fabric modules as current fabric code may sleep here waiting for
TFO->check_stop_free() to complete in main response path, and because
target_wait_for_sess_cmds() calling TFO->release_cmd() to free fabric
descriptor memory directly.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
12 years agotarget: add back error handling in transport_complete_task
Christoph Hellwig [Wed, 2 Nov 2011 12:06:35 +0000 (05:06 -0700)]
target: add back error handling in transport_complete_task

The commit

    target: use a workqueue for I/O completions

accidentally removed setting t_tasks_failed in transport_complete_task.
Add it back in a slightly cleaner way; now it is set for every failed task
instead of special casing the last one completing by using the success
argument directly for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
12 years agotarget/pscsi: blk_make_request() returns an ERR_PTR()
Dan Carpenter [Wed, 2 Nov 2011 15:48:15 +0000 (08:48 -0700)]
target/pscsi: blk_make_request() returns an ERR_PTR()

The check is wrong here because blk_make_request() returns an
ERR_PTR() and it doesn't return NULL.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
12 years agotarget: Remove core TRANSPORT_FREE_CMD_INTR usage
Nicholas Bellinger [Wed, 2 Nov 2011 15:28:20 +0000 (08:28 -0700)]
target: Remove core TRANSPORT_FREE_CMD_INTR usage

This patch drops TRANSPORT_FREE_CMD_INTR usage from target core, which
includes the removal of transport_generic_free_cmd_intr() symbol,
TRANSPORT_FREE_CMD_INTR usage in transport_processing_thread(), and
special case LUN_RESET handling to skip TRANSPORT_FREE_CMD_INTR processing
in core_tmr_drain_cmd_list().  We now expect that fabric modules will
use an internal workqueue to provide process context when releasing
se_cmd descriptor resources via transport_generic_free_cmd().

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Madhuranath Iyengar <mni@risingtidesystems.com>
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: Make TFO->check_stop_free return free status
Nicholas Bellinger [Wed, 2 Nov 2011 10:33:16 +0000 (03:33 -0700)]
target: Make TFO->check_stop_free return free status

This patch converts target_core_fabric_ops->check_stop_free() usage in
transport_cmd_check_stop() and associated fabric module usage to
return '1' when the passed se_cmd has been released directly within
->check_stop_free(), or return '0' when the passed se_cmd has not
been released.

This addresses an issue where transport_cmd_finish_abort() ->
transport_cmd_check_stop_to_fabric() was leaking descriptors during
LUN_RESET for modules using ->check_stop_free(), but not directly
releasing se_cmd in all cases.

Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agoiscsi-target: Fix non-immediate TMR handling
Nicholas Bellinger [Fri, 28 Oct 2011 20:37:19 +0000 (13:37 -0700)]
iscsi-target: Fix non-immediate TMR handling

This patch addresses two issues with non immediate TMR handling in
iscsit_handle_task_mgt_cmd().  The first involves breakage due to
v3.1-rc conversion of iscsit_sequence_cmd(), which upon good status
would hit the iscsit_add_reject_from_cmd() block of code.  This patch
adds an explict check for CMDSN_ERROR_CANNOT_RECOVER.

The second adds a check to return when non immediate TMR operation is
detected after iscsit_ack_from_expstatsn(), as iscsit_sequence_cmd()
-> iscsit_execute_cmd() will have called transport_generic_handle_tmr()
for the non immediate TMR case already.

Cc: Andy Grover <agrover@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: Add missing CMDSN_LOWER_THAN_EXP check in iscsit_handle_scsi_cmd
Nicholas Bellinger [Fri, 28 Oct 2011 20:32:35 +0000 (13:32 -0700)]
iscsi-target: Add missing CMDSN_LOWER_THAN_EXP check in iscsit_handle_scsi_cmd

This patch adds a missing CMDSN_LOWER_THAN_EXP return check for
iscsit_sequence_cmd() in iscsit_handle_scsi_cmd() that was incorrectly
dropped during the v3.1-rc cleanups to use iscsit_sequence_cmd().

Cc: Andy Grover <agrover@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Avoid double list_del for aborted se_tmr_req
Joern Engel [Thu, 27 Oct 2011 22:44:46 +0000 (15:44 -0700)]
target: Avoid double list_del for aborted se_tmr_req

After the list_del() in core_tmr_drain_tmr_list(),
core_tmr_release_req() would list_del() the same object again.

Call graph:
        core_tmr_drain_tmr_list
        transport_cmd_finish_abort_tmr
        transport_generic_remove
        transport_free_se_cmd
        core_tmr_release_req

So use list_del_init(), as list_del() of an initialized list_head is
safe and essentially a nop.  In the CONFIG_DEBUG_LIST case, list_del()
actually poisons the list_head, but that is fine as we free the object
directly afterwards.

Signed-off-by: Joern Engel <joern@logfs.org>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: Minor cleanups to core_tmr_drain_tmr_list
Joern Engel [Wed, 26 Oct 2011 21:22:19 +0000 (14:22 -0700)]
target: Minor cleanups to core_tmr_drain_tmr_list

This patch adds a handful minor cleanups to core_tmr_drain_tmr_list() that
remove an unnecessary NULL check, use list_for_each_entry_safe() instead of
list_entry(), and makes the drain_tmr_list walk use *tmr_p instead of
directly referencing the passed *tmr function parameter.

Signed-off-by: Joern Engel <joern@logfs.org>
Cc: Joern Engel <joern@logfs.org>
Reviewed-by: Roland Dreier <roland@purestorage.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Fix wrong se_tmr being added to drain_tmr_list
Joern Engel [Wed, 26 Oct 2011 20:37:56 +0000 (13:37 -0700)]
target: Fix wrong se_tmr being added to drain_tmr_list

This patch fixes another bug from LUN_RESET re-org fallout in
core_tmr_drain_tmr_list() that was adding the wrong se_tmr_req
into the local drain_tmr_list to be walked + released.

Signed-off-by: Joern Engel <joern@logfs.org>
Cc: Joern Engel <joern@logfs.org>
Reviewed-by: Roland Dreier <roland@purestorage.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Fix incorrect se_cmd assignment in core_tmr_drain_tmr_list
Joern Engel [Wed, 26 Oct 2011 05:08:43 +0000 (22:08 -0700)]
target: Fix incorrect se_cmd assignment in core_tmr_drain_tmr_list

This patch fixes a bug in core_tmr_drain_tmr_list() where drain_tmr_list
was using the wrong se_tmr_req for cmd assignment due to a typo during the
LUN_RESET re-org.  This was resulting in general protection faults while
using the leftover bogus *tmr_p pointer from list_for_each_entry_safe().

Signed-off-by: Joern Engel <joern@logfs.org>
Cc: Joern Engel <joern@logfs.org>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Check -ENOMEM to signal QUEUE_FULL from fabric callbacks
Nicholas Bellinger [Wed, 26 Oct 2011 06:57:41 +0000 (23:57 -0700)]
target: Check -ENOMEM to signal QUEUE_FULL from fabric callbacks

This patch changes target core to also check for -ENOMEM from fabric callbacks
to signal QUEUE_FULL status, instead of just -EAGAIN in order to catch a
larger set of fabric failure cases that want to trigger QUEUE_FULL logic.
This includes the callbacks for ->write_pending(), ->queue_data_in() and
->queue_status().

It also makes transport_generic_write_pending() return zero upon QUEUE_FULL,
and removes two unnecessary -EAGAIN checks to catch write pending QUEUE_FULL
cases from transport_generic_new_cmd() failures in transport_handle_cdb_direct()
and transport_processing_thread():TRANSPORT_NEW_CMD_MAP state.

Reported-by: Bart Van Assche <bvanassche@acm.org>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
12 years agotcm_loop: Add explict read buffer memset for SCF_SCSI_CONTROL_SG_IO_CDB
Nicholas Bellinger [Mon, 24 Oct 2011 20:35:37 +0000 (13:35 -0700)]
tcm_loop: Add explict read buffer memset for SCF_SCSI_CONTROL_SG_IO_CDB

This patch addresses an issue with buggy userspace code sending I/O
via scsi-generic that does not explictly clear their associated read
buffers.  It adds an explict memset of the first SGL entry within
tcm_loop_new_cmd_map() for SCF_SCSI_CONTROL_SG_IO_CDB payloads that
are currently guaranteed to be a single SGL by target-core code.

This issue is a side effect of the v3.1-rc1 merge to remove the
extra memcpy between certain control CDB types using a contigious
+ cleared buffer in target-core, and performing a memcpy into the
SGL list within tcm_loop.

It was originally mainfesting itself by udev + scsi_id + scsi-generic
not properly setting up the expected /dev/disk/by-id/ symlinks because
the INQUIRY payload was containing extra bogus data preventing the
proper NAA IEEE WWN from being parsed by userspace.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Fix compile warning w/ missing module.h include
Nicholas Bellinger [Tue, 25 Oct 2011 06:43:29 +0000 (06:43 +0000)]
target: Fix compile warning w/ missing module.h include

This patch fixes the following compile warning in target_core_cdb.c in
recent linux-next code due to the new use of EXPORT_SYMBOL() for
target_get_task_cdb().

drivers/target/target_core_cdb.c:1316: warning: data definition has no type or storage class
drivers/target/target_core_cdb.c:1316: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’
drivers/target/target_core_cdb.c:1316: warning: parameter names (without types) in function declaration

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Remove legacy se_task->task_timer and associated logic
Nicholas Bellinger [Mon, 24 Oct 2011 01:46:36 +0000 (18:46 -0700)]
target: Remove legacy se_task->task_timer and associated logic

This patch removes the legacy usage of se_task->task_timer and associated
infrastructure that originally was used as a way to help manage buggy backend
SCSI LLDs that in certain cases would never return back an outstanding task.

This includes the removal of target_complete_timeout_work(), timeout logic
from transport_complete_task(), transport_task_timeout_handler(),
transport_start_task_timer(), the per device task_timeout configfs attribute,
and all task_timeout associated structure members and defines in
target_core_base.h

This is being removed in preparation to make transport_complete_task() run
in lock-less mode.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Fix incorrect transport_sent usage
Nicholas Bellinger [Mon, 24 Oct 2011 01:16:13 +0000 (18:16 -0700)]
target: Fix incorrect transport_sent usage

This patch converts target-core to use se_cmd->t_transport_sent instead of
a duplicated se_cmd->transport_sent member in a handful of locations.
It also updates iscsi_target to properly use ->t_transport_sent instead of
it's own iscsi_cmd_t->transport_sent value that was not being assigned.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: re-use the command S/G list for single-task commands
Christoph Hellwig [Tue, 18 Oct 2011 10:57:03 +0000 (06:57 -0400)]
target: re-use the command S/G list for single-task commands

If we only have a single task per command (which at least in my testing
is the by far most common case) we do not have to allocate a new per-task
S/G list but can reuse the one from the command.

(nab: Fix BIDI handling in transport_free_dev_tasks)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Fix BIDI t_task_cdb handling in transport_generic_new_cmd
Nicholas Bellinger [Sat, 22 Oct 2011 11:06:23 +0000 (04:06 -0700)]
target: Fix BIDI t_task_cdb handling in transport_generic_new_cmd

This patch fixes a bug for BIDI handling in transport_generic_new_cmd() where
cmd->t_task_cdbs_left and Co. where not taking into account the extra
task count generated during the first call to transport_allocate_data_tasks().

Cc: Christoph Hellwig <hch@lst.de>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove transport_allocate_tasks
Christoph Hellwig [Tue, 18 Oct 2011 10:57:02 +0000 (06:57 -0400)]
target: remove transport_allocate_tasks

There were only two callers, and one of them always wants the call
to transport_allocate_data_tasks anyway.  Also drop the constant
lba argument to transport_allocate_data_tasks and move the variables
inside it into the minimum required scope.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: merge transport_new_cmd_obj into transport_generic_new_cmd
Christoph Hellwig [Tue, 18 Oct 2011 10:57:01 +0000 (06:57 -0400)]
target: merge transport_new_cmd_obj into transport_generic_new_cmd

These are two fairly small functions, and merging them gives a much
more readable control flow, and opportunities for more useful comments.

It also moves all code related to resources allocation closer together
and allows to remove a forward declaration for transport_allocate_tasks.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the task_sg_bidi field se_task and pSCSI BIDI support
Christoph Hellwig [Tue, 18 Oct 2011 10:57:00 +0000 (06:57 -0400)]
target: remove the task_sg_bidi field se_task and pSCSI BIDI support

This field is never used given that BIDI handling happens at the
command and not the task level.  Remove it and the dead code in
pscsi that tries to work on it.

It also prevents pSCSI passthrough for the two currently enabled BIDI
commands now that task->task_sg_bidi support has been removed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: transport_subsystem_check_init cleanups
Nicholas Bellinger [Sat, 22 Oct 2011 08:03:54 +0000 (01:03 -0700)]
target: transport_subsystem_check_init cleanups

Remove the now unnecessary extra call to transport_subsystem_check_init() in
target_core_register_fabric(), and also merge transport_subsystem_reqmods()
directly into transport_subsystem_check_init().

Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: use a workqueue for I/O completions
Christoph Hellwig [Mon, 17 Oct 2011 17:56:53 +0000 (13:56 -0400)]
target: use a workqueue for I/O completions

Instead of abusing the target processing thread for offloading I/O
completion in the backends to user context add a new workqueue.  This means
completions can be processed as fast as available CPU time allows it,
including in parallel with other completions and more importantly I/O
submission or QUEUE FULL retries.  This should give much better performance
especially on loaded systems.

As a fallout we can merge all the completed states into a single
one.

On the downside this change complicates lun reset handling a bit by
requiring us to cancel a work item only for those states that have it
initialized.  The alternative would be to either always initialize the work
item to a dummy handler, or always use the same handler and do a switch on
the state. The long term solution will be a flag that says that the command
has an initialized work item, but that's only going to be useful once we
have more users.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove unused TRANSPORT_ states
Christoph Hellwig [Mon, 17 Oct 2011 17:56:52 +0000 (13:56 -0400)]
target: remove unused TRANSPORT_ states

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove TRANSPORT_DEFERRED_CMD state
Christoph Hellwig [Mon, 17 Oct 2011 17:56:51 +0000 (13:56 -0400)]
target: remove TRANSPORT_DEFERRED_CMD state

We never check for this state, and it makes testing for a completed
state much harder given that it overrides the existing state.

Also remove the unused deferred_t_state which is related to it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the TRANSPORT_REMOVE state
Christoph Hellwig [Mon, 17 Oct 2011 17:56:50 +0000 (13:56 -0400)]
target: remove the TRANSPORT_REMOVE state

We never queue an command with this state, and only set it in a completely
bogus place in tcm_fc.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: move depth_left manipulation out of transport_generic_request_failure
Christoph Hellwig [Mon, 17 Oct 2011 17:56:49 +0000 (13:56 -0400)]
target: move depth_left manipulation out of transport_generic_request_failure

We only need to decrement dev->depth_left if failing a command from
__transport_execute_tasks.  Instead of doing it first thing in
transport_generic_request_failure and requiring a pseudo-flag argument
for it just opencode the decrement in the two callers (which should
be factored into a single one anyway)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: stop task timers earlier
Christoph Hellwig [Mon, 17 Oct 2011 17:56:48 +0000 (13:56 -0400)]
target: stop task timers earlier

Currently we stop the timers for all tasks in a command fairly late during
I/O completion, which is fairly pointless and requires all kinds of safety
checks.

Instead delete pending timers early on in transport_complete_task, thus
ensuring no new timers firest after that.  We take t_state_lock a bit later
in that function thus making sure currenly running timers are out of the
criticial section.  To be completely sure the timer has finished we also
add another del_timer_sync call when freeing the task.

This also allows removing TF_TIMER_RUNNING as it would be equivalent
to TF_ACTIVE now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove TF_TIMER_STOP
Christoph Hellwig [Mon, 17 Oct 2011 17:56:47 +0000 (13:56 -0400)]
target: remove TF_TIMER_STOP

TF_TIMER_STOP is useless as it only helps to mitigate a tiny race during
deleting the timer.  But given that we have cleared TF_ACTIVE at this point
we already have another mitigation a few lines down the function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: factor some duplicate code for stopping a task
Christoph Hellwig [Mon, 17 Oct 2011 17:56:46 +0000 (13:56 -0400)]
target: factor some duplicate code for stopping a task

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: fix list walking in transport_free_dev_tasks
Christoph Hellwig [Mon, 17 Oct 2011 17:56:45 +0000 (13:56 -0400)]
target: fix list walking in transport_free_dev_tasks

list_for_each_entry_safe only protects against deletions from the list,
but not against any concurrent modifications.  Given that we drop
t_state_lock inside the loop it is not safe in transport_free_dev_tasks.

Instead of use a local dispose_list that we move all tasks that are
to be deleted to.  This is safe because we never do list_emptry checks
on t_list to check if a command is on the list anywhere.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: use transport_cmd_check_stop_to_fabric consistently
Christoph Hellwig [Mon, 17 Oct 2011 17:56:44 +0000 (13:56 -0400)]
target: use transport_cmd_check_stop_to_fabric consistently

Change one remaining user of transport_cmd_check_stop(cmd, 2, 0) to the
transport_cmd_check_stop_to_fabric wrapper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: do not pass the queue object to transport_remove_cmd_from_queue
Christoph Hellwig [Mon, 17 Oct 2011 17:56:43 +0000 (13:56 -0400)]
target: do not pass the queue object to transport_remove_cmd_from_queue

We always operated on the same queue, so move finding it into the function,
just like we do for all other helpers operating on it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove SCF_EMULATE_QUEUE_FULL
Christoph Hellwig [Mon, 17 Oct 2011 17:56:42 +0000 (13:56 -0400)]
target: remove SCF_EMULATE_QUEUE_FULL

Add a new boolean at_head parameter to transport_add_cmd_to_queue and thus
obsolete the SCF_EMULATE_QUEUE_FULL flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove the transport_qf_callback se_cmd callback
Christoph Hellwig [Mon, 17 Oct 2011 17:56:41 +0000 (13:56 -0400)]
target: remove the transport_qf_callback se_cmd callback

Remove the need for the transport_qf_callback callback by making
sure we have specific states with specific handlers for the two
queue full cases.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: clean up the backend interface to caching parameters
Christoph Hellwig [Fri, 14 Oct 2011 11:30:17 +0000 (07:30 -0400)]
target: clean up the backend interface to caching parameters

Remove the dpo_emulated, fua_write_emulated, fua_read_emulated and
write_cache_emulated methods, and replace them with a simple bitfields in
se_subsystem_api in those cases where they ever returned one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: make iblock_emulate_sync_cache asynchronous
Christoph Hellwig [Fri, 14 Oct 2011 11:29:58 +0000 (07:29 -0400)]
target: make iblock_emulate_sync_cache asynchronous

Do not block the submitting thread when handling a SYNCHRONIZE CACHE command,
but implement it asynchronously by sending the FLUSH command ourself and
calling transport_complete_sync_cache from the completion handler.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Fix REPORT TARGET PORT GROUPS handling with small allocation length
Nicholas Bellinger [Wed, 19 Oct 2011 06:48:04 +0000 (23:48 -0700)]
target: Fix REPORT TARGET PORT GROUPS handling with small allocation length

This patch fixes a bug with the handling of REPORT TARGET PORT GROUPS
containing a smaller allocation length than the payload requires causing
memory writes beyond the end of the buffer.  This patch checks for the
minimum 4 byte length for the response payload length, and also checks
upon each loop of T10_ALUA(su_dev)->tg_pt_gps_list to ensure the Target
port group and Target port descriptor list is able to fit into the
remaining allocation length.

If the response payload exceeds the allocation length length, then rd_len
is still increments to indicate to the initiator that the payload has
been truncated.

Reported-by: Roland Dreier <roland@purestorage.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: remove the ->transport_split_cdb callback in se_cmd
Christoph Hellwig [Wed, 12 Oct 2011 15:09:13 +0000 (11:09 -0400)]
target: remove the ->transport_split_cdb callback in se_cmd

Add a switch statement implementing the CDB LBA/len update directly
in target_get_task_cdb and remove the old ->transport_split_cdb
callback and all its implementations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: replace ->get_cdb with a target_get_task_cdb helper
Christoph Hellwig [Wed, 12 Oct 2011 15:09:12 +0000 (11:09 -0400)]
target: replace ->get_cdb with a target_get_task_cdb helper

Instead of calling out to the backends from the core to get a per-task
CDB and then modify it for the LBA/len pair used for this CDB provide
a helper that writes the adjusted CDB into a provided buffer and call
this method from ->do_task in pscsi.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: make the ->get_cdb method optional
Christoph Hellwig [Wed, 12 Oct 2011 15:09:11 +0000 (11:09 -0400)]
target: make the ->get_cdb method optional

The most commonly used file, iblock and rd backends have no use for
a per-task CDB and thus don't need a method to copy it into their
otherwise unused CDB fields.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: pack struct se_task more tightly
Christoph Hellwig [Wed, 12 Oct 2011 15:07:07 +0000 (11:07 -0400)]
target: pack struct se_task more tightly

Rearrange the fields in se_task to avoid holes.  Also increase the
flags field to 16 bits as we have the space for it, and this makes
adding new flags safer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Remove unnecessary se_task members
Christoph Hellwig [Wed, 12 Oct 2011 15:07:04 +0000 (11:07 -0400)]
target: Remove unnecessary se_task members

This is a squashed version of the following unnecessary se_task structure
member removal patches:

target: remove the task_execute_queue field in se_task

    Instead of using a separate flag we can simply do list_emptry checks
    on t_execute_list if we make sure to always use list_del_init to remove
    a task from the list.  Also factor some duplicate code into a new
    __transport_remove_task_from_execute_queue helper.

target: remove the read-only task_no field in se_task

    The task_no field never was initialized and only used in debug printks,
    so kill it.

target: remove the task_padded_sg field in se_task

    This field is only check in one place and not actually needed there.

    Rationale:
    - transport_do_task_sg_chain asserts that we have task_sg_chaining
      set early on
    - we only make use of the sg_prev_nents field we calculate based on it
      if there is another sg list that gets chained onto this one, which
      never happens for the last (or only) task.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: make more use of the task_flags field in se_task
Christoph Hellwig [Wed, 12 Oct 2011 15:07:03 +0000 (11:07 -0400)]
target: make more use of the task_flags field in se_task

Replace various atomic_t variables that were mostly under t_state_lock
with new flags in task_flags.  Note that the execution error path
didn't take t_state_lock before, so add it there.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Cleanup unused se_task bits
Christoph Hellwig [Wed, 12 Oct 2011 15:07:00 +0000 (11:07 -0400)]
target: Cleanup unused se_task bits

This is a squashed version of the following se_task cleanup patches:

    target: remove the unused task_state_flags field in se_task
    target: remove the unused se_obj_ptr field in se_task
    target: remove the se_dev field in se_task

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Cleanup unused target_core_base.h bits
Christoph Hellwig [Wed, 12 Oct 2011 15:06:56 +0000 (11:06 -0400)]
target: Cleanup unused target_core_base.h bits

This is a squashed version of the following target_core_base.h
cleanup patches:

    target: remove the unused SHUTDOWN_SIGS defintion
    target: remove unused se_mem leftovers
    target: remove the unused map_func_t typedef
    target: move TRANSPORT_IOV_DATA_BUFFER to the iscsi-specific code

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoloopback: Prevent uninitialized use of tl_tpg in tcm_loop_queuecommand
Nicholas Bellinger [Tue, 11 Oct 2011 02:44:05 +0000 (19:44 -0700)]
loopback: Prevent uninitialized use of tl_tpg in tcm_loop_queuecommand

This patch fixes a bug with tcm_loop where performing a scsi_host rescan was
causing an oops due to a received scsi_cmnd->device->id value not matching a
previously configured tcm_loop_tpg entry in tcm_loop_hba->tl_hba_tpgs[]
obtained from within tcm_loop_queuecommand() code.

This fix adds an explict check for tcm_loop_tpg->tl_hba in order to ensure
tcm_loop_make_naa_tpg() has already been invoked to initialize a given
tcm_loop_tpg entry, and also adds an explict clear of tcm_loop_tpg->tl_hba
from within the tcm_loop_drop_naa_tpg() release path.

This bug was manifesting itself with the following OOPs:

[176289.430909] BUG: unable to handle kernel NULL pointer dereference at 0000000000000090
[176289.431337] IP: [<ffffffffa0395617>] transport_processing_thread+0x1e3/0x794 [target_core_mod]
[176289.431399] PGD 22e9b067 PUD 23375067 PMD 0
[176289.431399] Oops: 0000 [#1] SMP
[176289.431815] CPU 1
[176289.431815] Modules linked in: tcm_loop target_core_stgt target_core_pscsi target_core_file target_core_iblock target_core_mod crc32c ib_cm ib_sa ib_mad ib_core qla2xxx scsi_tgt configfs fcoe libfcoe libfc scsi_transport_fc ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi sr_mod cdrom sd_mod ata_piix libata e1000 mptspi mptscsih mptbase [last unloaded: target_core_mod]
[176289.431815]
[176289.431815] Pid: 12339, comm: LIO_iblock Tainted: G        W   3.1.0-rc8+
[176289.431815] RIP: 0010:[<ffffffffa0395617>]  [<ffffffffa0395617>] transport_processing_thread+0x1e3/0x794 [target_core_mod]
[176289.431815] RSP: 0018:ffff880023bfbe10  EFLAGS: 00010283
[176289.431815] RAX: 0000000000000000 RBX: ffff88002d600040 RCX: ffff88002d600108
[176289.431815] RDX: ffff88000c9e50bc RSI: 0000000000000246 RDI: 0000000000000246
[176289.431815] RBP: ffff880023bfbee0 R08: ffff88002d600108 R09: 0000000000000000
[176289.431815] R10: ffff88002fc8cc80 R11: ffffffff81671b60 R12: ffff88002d600108
[176289.431815] R13: ffff88000c9e4f38 R14: ffff88000c9e50b8 R15: 0000000000000000
[176289.431815] FS:  0000000000000000(0000) GS:ffff88002fc80000(0000) knlGS:0000000000000000
[176289.431815] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[176289.431815] CR2: 0000000000000090 CR3: 000000002a33f000 CR4: 00000000000006e0
[176289.431815] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[176289.431815] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[176289.431815] Process LIO_iblock (pid: 12339, threadinfo ffff880023bfa000, task ffff88002a2e0000)
[176289.431815] Stack:
[176289.431815]  0000000000011280 0000000000000246 ffff88002a2e0000 ffff880023a58900
[176289.431815]  ffff880023bfbed0 ffff880023bfa000 ffff880023bfa000 ffff88000c9e50d0
[176289.431815]  ffff88000c9e50c0 ffff88000c9e50bc ffff880023bfa000 ffff880023bfbfd8
[176289.431815] Call Trace:
[176289.431815]  [<ffffffff81056657>] ? wake_up_bit+0x25/0x25
[176289.431815]  [<ffffffffa0395434>] ? transport_handle_cdb_direct+0x92/0x92 [target_core_mod]
[176289.431815]  [<ffffffff8105619a>] kthread+0x7d/0x85
[176289.431815]  [<ffffffff813cbcb4>] kernel_thread_helper+0x4/0x10
[176289.431815]  [<ffffffff8105611d>] ? kthread_worker_fn+0x16d/0x16d
[176289.431815]  [<ffffffff813cbcb0>] ? gs_change+0x13/0x13
[176289.431815] Code: 67 05 00 00 41 8b 84 24 4c ff ff ff ff c8 83 f8 11 0f 87 f0 04 00 00 89 c0 ff 24 c5 b0 c6 39 a0 0f 0b eb fe 48 8b 83 d8 00 00 00
[176289.431815] RIP  [<ffffffffa0395617>] transport_processing_thread+0x1e3/0x794 [target_core_mod]
[176289.431815]  RSP <ffff880023bfbe10>
[176289.431815] CR2: 0000000000000090
[176295.041004] ---[ end trace 85dc6865b23b8f3e ]---

Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Remove legacy + unused device active I/O shutdown code
Nicholas Bellinger [Sun, 9 Oct 2011 09:19:01 +0000 (02:19 -0700)]
target: Remove legacy + unused device active I/O shutdown code

This patch removes the legacy device active I/O shutdown code that was
originally called from transport_processing_thread() context during shutdown
including transport_processing_shutdown() and transport_release_all_cmds().

This is due to the fact that in modern configfs control plane code by the
time shutdown of an se_device instance in transport_processing_thread()
is allowed to occur via:

rmdir /sys/kernel/config/target/core/$HBA/$DEV

all active I/O will already have been ceased while removing active configfs
fabric Port/LUN symlinks.  Eg: the removal of an active se_device is protected
by inter-module VFS references from active Port/LUN symlinks.

Two WARN_ON() checks have been added in their place before exiting
transport_processing_thread() to watch out for any leaked descriptors.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Merge transport_cmd_finish_abort_tmr into transport_cmd_finish_abort
Nicholas Bellinger [Sun, 9 Oct 2011 09:02:51 +0000 (02:02 -0700)]
target: Merge transport_cmd_finish_abort_tmr into transport_cmd_finish_abort

This patch merges transport_cmd_finish_abort_tmr() logic into a single
transport_cmd_finish_abort() function by adding a cmd->se_tmr_req check
around transport_lun_remove_cmd(), and updates the single caller within
core_tmr_drain_tmr_list().

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: Remove SCF_SE_LUN_CMD flag abuses
Nicholas Bellinger [Sun, 9 Oct 2011 08:48:14 +0000 (01:48 -0700)]
iscsi-target: Remove SCF_SE_LUN_CMD flag abuses

This patch removes a number of SCF_SE_LUN_CMD flag abuses within iscsi-target
code to determine when iscsit_release_cmd() or transport_generic_free_cmd()
should be called while releasing an individual iscsi_cmd descriptor.

In the place of SCF_SE_LUN_CMD checks, this patch converts existing code to
use a new iscsit_free_cmd() that inspects iscsi_cmd->iscsi_opcode types to
determine which of the above functions should be invoked.  It also removes the
now unnecessary special case checking in iscsit_release_commands_from_conn().

(hch: Use iscsit_free_cmd instead of open-coded alternative)

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Convert ->transport_wait_for_tasks usage to transport_generic_free_cmd
Nicholas Bellinger [Sun, 9 Oct 2011 08:00:58 +0000 (01:00 -0700)]
target: Convert ->transport_wait_for_tasks usage to transport_generic_free_cmd

This patch converts se_cmd->transport_wait_for_tasks(se_cmd, 1) usage to use
transport_generic_free_cmd() directly in target-core and iscsi-target fabric
usage.  The includes:

*) Removal of the optional transport_generic_free_cmd() call from within
   transport_generic_wait_for_tasks()
*) Usage of existing SCF_SUPPORTED_SAM_OPCODE to determine when
   transport_generic_wait_for_tasks() processing may occur instead of
   checking se_cmd->transport_wait_for_tasks()
*) Move transport_generic_wait_for_tasks() call ahead of core_dec_lacl_count()
   and transport_lun_remove_cmd() in transport_generic_free_cmd() to follow
   existing logic for iscsi-target w/ se_cmd->transport_wait_for_tasks(se_cmd, 1)
*) Removal of se_cmd->transport_wait_for_tasks() function pointer
*) Rename transport_generic_wait_for_tasks() -> transport_wait_for_tasks(), and
   add docbook comment.
*) Add EXPORT_SYMBOL for transport_wait_for_tasks()

For the case in iscsi_target_erl2.c:iscsit_prepare_cmds_for_realligance()
where se_cmd->transport_wait_for_tasks(se_cmd, 0) is called, this patch
adds a direct call to transport_wait_for_tasks().

(hch: Fix transport_generic_free_cmd() usage in iscsit_release_commands_from_conn)
(nab: Add patch: Ensure that TMRs hit wait_for_tasks logic during release)

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Have core_tmr_alloc_req() take an explicit GFP_xxx flag
Roland Dreier [Thu, 6 Oct 2011 16:56:16 +0000 (09:56 -0700)]
target: Have core_tmr_alloc_req() take an explicit GFP_xxx flag

Testing in_interrupt() to know when sleeping is allowed is not really
reliable (since eg it won't be true if the caller is holding a spinlock).
Instead have the caller tell core_tmr_alloc_req() what GFP_xxx to use;
every caller except tcm_qla2xxx can use GFP_KERNEL.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Make pscsi_create_virtdevice use ERR_CAST
Dan Carpenter [Sat, 1 Oct 2011 22:59:13 +0000 (01:59 +0300)]
target: Make pscsi_create_virtdevice use ERR_CAST

This patch changes pscsi_create_virtdevice() to properly return ERR_CAST
instead of a raw pointer upon scsi_host_lookup() failure.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotcm_fc: remove custom hex_to_bin in ft_parse_wwn
Andy Shevchenko [Fri, 30 Sep 2011 11:45:40 +0000 (14:45 +0300)]
tcm_fc: remove custom hex_to_bin in ft_parse_wwn

This patch converts ft_parse_wwn() to use hex_to_bin() instead of custom
conversion code.

(Andy: Re-add missing strict && isupper(c) check)

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: use native hex2bin for chap_string_to_hex
Andy Shevchenko [Fri, 30 Sep 2011 11:39:54 +0000 (14:39 +0300)]
iscsi-target: use native hex2bin for chap_string_to_hex

This patch converts chap_string_to_hex() to use hex2bin() instead of
the internal chap_asciihex_to_binaryhex().

(nab: Fix up minor compile breakage + typo)

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove unused se_subsystem_api methods
Christoph Hellwig [Sun, 25 Sep 2011 18:56:43 +0000 (14:56 -0400)]
target: remove unused se_subsystem_api methods

The cdb_none, map_data_SG and map_control_SG methods have no callers left
and can be removed now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: cleanup pscsi request submission
Christoph Hellwig [Sun, 25 Sep 2011 18:56:32 +0000 (14:56 -0400)]
target: cleanup pscsi request submission

Move the entirely request allocation, mapping and submission into ->do_task.
This

 a) avoids blocking the I/O submission thread unessecarily, and
 b) simplifies the code greatly

Note that the code seems to have various error handling issues, mostly
related to bidi handling in the current form.  I've added comments about
those but not tried to fix them in this commit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: cleanup iblock bio submission
Christoph Hellwig [Sun, 25 Sep 2011 18:56:24 +0000 (14:56 -0400)]
target: cleanup iblock bio submission

Move the entirely bio allocation, mapping and submission into ->do_task.
This

 a) avoids blocking the I/O submission thread unessecarily, and
 b) simplifies the code greatly

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: simplify target_parse_naa_6h_vendor_specific()
Andy Shevchenko [Mon, 19 Sep 2011 08:11:21 +0000 (11:11 +0300)]
target: simplify target_parse_naa_6h_vendor_specific()

This patch adds a minor simplfication in target_parse_naa_6h_vendor_specific()
to remove direct isxdigit() + ctype.h usage.

(nab: Fix next assignment breakage in for loop)

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Remove session_reinstatement parameter from ->transport_wait_for_tasks
Nicholas Bellinger [Sat, 8 Oct 2011 20:59:52 +0000 (13:59 -0700)]
target: Remove session_reinstatement parameter from ->transport_wait_for_tasks

This patch removes the unnecessary session_reinstatement parameter from
se_cmd->transport_wait_for_tasks(), logic in transport_generic_wait_for_tasks,
and usage within iscsi-target code.

This also includes the removal of the 'bool' return from transport_put_cmd() +
transport_generic_free_cmd() that is no longer necessary.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: push session reinstatement out of transport_generic_free_cmd
Christoph Hellwig [Tue, 13 Sep 2011 21:09:01 +0000 (23:09 +0200)]
target: push session reinstatement out of transport_generic_free_cmd

Push session reinstatement out of transport_generic_free_cmd into the only
caller that actually needs it.  Clean up transport_generic_free_cmd a bit,
and remove the useless comment.  I'd love to add a more useful kerneldoc
comment for it, but as this point I'm still a bit confused in where it
stands in the command release stack.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove transport_generic_remove
Christoph Hellwig [Tue, 13 Sep 2011 21:08:50 +0000 (23:08 +0200)]
target: remove transport_generic_remove

All callers that never have the session_reinstatement flag set can trivially
be converted to transport_put_cmd.  Opencode the session reinstatement code
in transport_generic_free_cmd, which was the only caller ever asking for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: simplify transport_put_cmd
Christoph Hellwig [Tue, 13 Sep 2011 21:08:42 +0000 (23:08 +0200)]
target: simplify transport_put_cmd

Inline two simple functions only used by it, and replace a goto
with a simple if else construct.

Note that the code moved from transport_dec_and_check seems fairly
buggy - the atomic_read check on a variable where we'd do an
atomic_dec_and_test looks racy if we'll ever get someone increment
it without the lock held around them (which it looks like we do),
and not decrementing the second counter if the first one doesn't
hit zero also at least needs an explanation.

(nab: Fix transport_put_cmd breakage)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: simplify transport_generic_remove
Christoph Hellwig [Tue, 13 Sep 2011 21:08:32 +0000 (23:08 +0200)]
target: simplify transport_generic_remove

Instead of duplicating the code from transport_release_fe_cmd re-use it by
allowing transport_release_fe_cmd to return wether it actually freed the
command or not.  Also rename transport_release_fe_cmd to transport_put_cmd
and add a kerneldoc comment for it to make the use case more obvious.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove transport_free_se_cmd
Christoph Hellwig [Tue, 13 Sep 2011 21:08:19 +0000 (23:08 +0200)]
target: remove transport_free_se_cmd

It is only called by transport_release_cmd, so inline it there.  Also add
a kerneldoc comment for transport_release_cmd while we are at it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: don't opencode transport_release_cmd in transport_release_fe_cmd
Christoph Hellwig [Tue, 13 Sep 2011 21:08:11 +0000 (23:08 +0200)]
target: don't opencode transport_release_cmd in transport_release_fe_cmd

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: remove transport_generic_handle_cdb
Christoph Hellwig [Mon, 12 Sep 2011 19:51:14 +0000 (21:51 +0200)]
target: remove transport_generic_handle_cdb

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoiscsi-target: always call transport_handle_cdb_direct
Christoph Hellwig [Mon, 12 Sep 2011 19:50:56 +0000 (21:50 +0200)]
iscsi-target: always call transport_handle_cdb_direct

iscsit_task_reassign_complete is always called from the TX thread, so
handle the CDB directly instead of offloading it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotfm_fc: use transport_handle_cdb_direct
Christoph Hellwig [Mon, 12 Sep 2011 19:50:49 +0000 (21:50 +0200)]
tfm_fc: use transport_handle_cdb_direct

ft_send_work is always called from workqueue context, which means we can
handle the CDB directly instead of doing another context switch.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agotarget: Prevent transport_send_task_abort when CHECK_CONDITION status
Nicholas Bellinger [Thu, 29 Sep 2011 21:22:13 +0000 (14:22 -0700)]
target: Prevent transport_send_task_abort when CHECK_CONDITION status

This patch fixes a bug where transport_send_task_abort() could be called
during LUN_RESET to return SAM_STAT_TASK_ABORTED + tfo->queue_status(), when
SCF_SENT_CHECK_CONDITION -> tfo->queue_status() has already been sent from
within another context via transport_send_check_condition_and_sense().

Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: Fix transport_cmd_finish_abort queue removal bug
Nicholas Bellinger [Thu, 29 Sep 2011 08:01:35 +0000 (01:01 -0700)]
target: Fix transport_cmd_finish_abort queue removal bug

This patch fixes a bug in LUN_RESET operation with transport_cmd_finish_abort()
where transport_remove_cmd_from_queue() was incorrectly being called, causing
descriptors with t_state == TRANSPORT_FREE_CMD_INTR to be incorrectly removed
from qobj->qobj_list during process context release.  This change ensures the
descriptor is only removed via transport_remove_cmd_from_queue() when doing a
direct release via transport_generic_remove().

Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: Prevent TRANSPORT_FREE_CMD_INTR processing in core_tmr_drain_cmd_list
Nicholas Bellinger [Tue, 11 Oct 2011 06:02:48 +0000 (06:02 +0000)]
target: Prevent TRANSPORT_FREE_CMD_INTR processing in core_tmr_drain_cmd_list

This patch contains a bugfix for TMR LUN_RESET related to TRANSPORT_FREE_CMD_INTR
operation, where core_tmr_drain_cmd_list() will now skip processing for this
case to prevent an ABORT_TASK status from being returned for descriptors that
are already queued up to be released by processing thread context.

Cc: Roland Dreier <roland@purestorage.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: Re-org of core_tmr_lun_reset
Nicholas Bellinger [Thu, 29 Sep 2011 04:37:29 +0000 (21:37 -0700)]
target: Re-org of core_tmr_lun_reset

This patch is a re-orginzation of core_tmr_lun_reset() logic to properly
scan the active tmr_list, dev->state_task_list and qobj->qobj_list w/ the
relivent locks held, and performing a list_move_tail onto seperate local
scope lists before performing the full drain.

This involves breaking out the code into three seperate list specific
functions: core_tmr_drain_tmr_list(), core_tmr_drain_task_list() and
core_tmr_drain_cmd_list().

(nab: Include target: Remove non-active tasks from execute list during
      LUN_RESET patch to address original breakage)

Reported-by: Roland Dreier <roland@purestorage.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: Prevent cmd->se_queue_node double add
Roland Dreier [Thu, 29 Sep 2011 05:12:07 +0000 (22:12 -0700)]
target: Prevent cmd->se_queue_node double add

This patch addresses a bug with the lio-core-2.6.git conversion of
transport_add_cmd_to_queue() to use a single embedded list_head, instead
of individual struct se_queue_req allocations allowing a single se_cmd to
be added to the queue mulitple times.  This was changed in the following:

commit 2a9e4d5ca5d99f4c600578d6285d45142e7e5208
Author: Andy Grover <agrover@redhat.com>
Date:   Tue Apr 26 17:45:51 2011 -0700

    target: Embed qr in struct se_cmd

The problem is that some target code still assumes performing multiple
adds is allowed via transport_add_cmd_to_queue(), which ends up causing
list corruption in qobj->qobj_list code.  This patch addresses this
by removing an existing struct se_cmd from the list before the add, and
removes an unnecessary list walk in transport_remove_cmd_from_queue()

It also changes cmd->t_transport_queue_active to use explict sets intead
of increment/decrement to prevent confusion during exception path handling.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: Andy Grover <agrover@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>
12 years agotarget: Remove unneeded version.h includes
Jesper Juhl [Mon, 1 Aug 2011 21:29:11 +0000 (23:29 +0200)]
target: Remove unneeded version.h includes

It was pointed out by 'make versioncheck' that some includes of
linux/version.h are not needed in drivers/target/.
This patch removes them.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
12 years agoMerge git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Mon, 10 Oct 2011 02:53:11 +0000 (14:53 +1200)]
Merge git://git.samba.org/sfrench/cifs-2.6

* git://git.samba.org/sfrench/cifs-2.6:
  [CIFS] Fix first time message on mount, ntlmv2 upgrade delayed to 3.2

12 years agoMerge branch 'fixes' of git://git.linaro.org/people/arnd/arm-soc
Linus Torvalds [Mon, 10 Oct 2011 02:48:27 +0000 (14:48 +1200)]
Merge branch 'fixes' of git://git.linaro.org/people/arnd/arm-soc

* 'fixes' of git://git.linaro.org/people/arnd/arm-soc:
  ARM: mach-ux500: enable fix for ARM errata 754322
  ARM: OMAP: musb: Remove a redundant omap4430_phy_init call in usb_musb_init
  ARM: OMAP: Fix i2c init for twl4030
  ARM: OMAP4: MMC: fix power and audio issue, decouple USBC1 from MMC1

12 years agoARM: tegra: fix compilation error due to mach/hardware.h removal
Marc Dietrich [Fri, 7 Oct 2011 15:31:41 +0000 (08:31 -0700)]
ARM: tegra: fix compilation error due to mach/hardware.h removal

This fixes a compilation error in cpu-tegra.c which was introduced in
dc8d966bccde ("ARM: convert PCI defines to variables") which removed the
now obsolete mach/hardware.h from the mach-tegra subtree.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Mon, 10 Oct 2011 02:43:06 +0000 (14:43 +1200)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon/kms: use hardcoded dig encoder to transmitter mapping for DCE4.1
  drm/radeon/kms: fix dp_detect handling for DP bridge chips
  drm/radeon/kms: retry aux transactions if there are status flags

12 years agoMAINTAINERS: Update tegra maintainer information
Olof Johansson [Fri, 7 Oct 2011 20:27:48 +0000 (13:27 -0700)]
MAINTAINERS: Update tegra maintainer information

A couple of changes to the Tegra maintainership setup:

I'm very glad to bring on Stephen Warren on board as a maintainer. The
work he has done so far is excellent, and the fact that he works for
Nvidia means he has long-term interest in the platform.

Erik Gilling did an astounding amount of work on getting things up and
running but has been a silent partner on the maintainership side for a
while, and is stepping down. Thanks for your contributions so far, Erik.

Finally, update the git URL since I'll take over running the main repo
for a while.

Overall maintainership model isn't changing much at this time: We'll all
three review patches as appropriate, and one of us will collect the main
repo (me at this time).

Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Erik Gilling <konkers@android.com>
Acked-by: Colin Cross <ccross@android.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Mon, 10 Oct 2011 02:39:03 +0000 (14:39 +1200)]
Merge branch 'upstream' of git://git.linux-mips.org/upstream-linus

* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (29 commits)
  MIPS: Call oops_enter, oops_exit in die
  staging/octeon: Software should check the checksum of no tcp/udp packets
  MIPS: Octeon: Enable C0_UserLocal probing.
  MIPS: No branches in delay slots for huge pages in handle_tlbl
  MIPS: Don't clobber CP0_STATUS value for CONFIG_MIPS_MT_SMTC
  MIPS: Octeon: Select CONFIG_HOLES_IN_ZONE
  MIPS: PM: Use struct syscore_ops instead of sysdevs for PM (v2)
  MIPS: Compat: Use 32-bit wrapper for compat_sys_futex.
  MIPS: Do not use EXTRA_CFLAGS
  MIPS: Alchemy: DB1200: Disable cascade IRQ in handler
  SERIAL: Lantiq: Set timeout in uart_port
  MIPS: Lantiq: Fix setting the PCI bus speed on AR9
  MIPS: Lantiq: Fix external interrupt sources
  MIPS: tlbex: Fix build error in R3000 code.
  MIPS: Alchemy: Include Au1100 in PM code.
  MIPS: Alchemy: Fix typo in MAC0 registration
  MIPS: MSP71xx: Fix build error.
  MIPS: Handle __put_user() sleeping.
  MIPS: Allow forced irq threading
  MIPS: i8259: Mark cascade interrupt non-threaded
  ...

12 years agoMerge branch 'omap/fixes-for-3.1' into fixes
Arnd Bergmann [Sat, 8 Oct 2011 20:21:07 +0000 (22:21 +0200)]
Merge branch 'omap/fixes-for-3.1' into fixes

12 years ago[CIFS] Fix first time message on mount, ntlmv2 upgrade delayed to 3.2
Steve French [Fri, 7 Oct 2011 04:14:07 +0000 (23:14 -0500)]
[CIFS] Fix first time message on mount, ntlmv2 upgrade delayed to 3.2

Microsoft has a bug with ntlmv2 that requires use of ntlmssp, but
we didn't get the required information on when/how to use ntlmssp to
old (but once very popular) legacy servers (various NT4 fixpacks
for example) until too late to merge for 3.1.  Will upgrade
to NTLMv2 in NTLMSSP in 3.2

Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
12 years agoARM: mach-ux500: enable fix for ARM errata 754322
srinidhi kasagar [Tue, 20 Sep 2011 05:45:46 +0000 (11:15 +0530)]
ARM: mach-ux500: enable fix for ARM errata 754322

This applies ARM errata fix 754322 for all ux500 platforms.

Cc: stable@kernel.org
Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
12 years agoMerge git://github.com/davem330/net
Linus Torvalds [Thu, 6 Oct 2011 23:15:10 +0000 (16:15 -0700)]
Merge git://github.com/davem330/net

* git://github.com/davem330/net:
  net: fix typos in Documentation/networking/scaling.txt
  bridge: leave carrier on for empty bridge
  netfilter: Use proper rwlock init function
  tcp: properly update lost_cnt_hint during shifting
  tcp: properly handle md5sig_pool references
  macvlan/macvtap: Fix unicast between macvtap interfaces in bridge mode

12 years agox86/PCI: use host bridge _CRS info on ASUS M2V-MX SE
Paul Menzel [Wed, 31 Aug 2011 15:07:10 +0000 (17:07 +0200)]
x86/PCI: use host bridge _CRS info on ASUS M2V-MX SE

In summary, this DMI quirk uses the _CRS info by default for the ASUS
M2V-MX SE by turning on `pci=use_crs` and is similar to the quirk
added by commit 2491762cfb47 ("x86/PCI: use host bridge _CRS info on
ASRock ALiveSATA2-GLAN") whose commit message should be read for further
information.

Since commit 3e3da00c01d0 ("x86/pci: AMD one chain system to use pci
read out res") Linux gives the following oops:

    parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
    HDA Intel 0000:20:01.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    HDA Intel 0000:20:01.0: setting latency timer to 64
    BUG: unable to handle kernel paging request at ffffc90011c08000
    IP: [<ffffffffa0578402>] azx_probe+0x3ad/0x86b [snd_hda_intel]
    PGD 13781a067 PUD 13781b067 PMD 1300ba067 PTE 800000fd00000173
    Oops: 0009 [#1] SMP
    last sysfs file: /sys/module/snd_pcm/initstate
    CPU 0
    Modules linked in: snd_hda_intel(+) snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event tpm_tis tpm snd_seq tpm_bios psmouse parport_pc snd_timer snd_seq_device parport processor evdev snd i2c_viapro thermal_sys amd64_edac_mod k8temp i2c_core soundcore shpchp pcspkr serio_raw asus_atk0110 pci_hotplug edac_core button snd_page_alloc edac_mce_amd ext3 jbd mbcache sha256_generic cryptd aes_x86_64 aes_generic cbc dm_crypt dm_mod raid1 md_mod usbhid hid sg sd_mod crc_t10dif sr_mod cdrom ata_generic uhci_hcd sata_via pata_via libata ehci_hcd usbcore scsi_mod via_rhine mii nls_base [last unloaded: scsi_wait_scan]
    Pid: 1153, comm: work_for_cpu Not tainted 2.6.37-1-amd64 #1 M2V-MX SE/System Product Name
    RIP: 0010:[<ffffffffa0578402>]  [<ffffffffa0578402>] azx_probe+0x3ad/0x86b [snd_hda_intel]
    RSP: 0018:ffff88013153fe50  EFLAGS: 00010286
    RAX: ffffc90011c08000 RBX: ffff88013029ec00 RCX: 0000000000000006
    RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246
    RBP: ffff88013341d000 R08: 0000000000000000 R09: 0000000000000040
    R10: 0000000000000286 R11: 0000000000003731 R12: ffff88013029c400
    R13: 0000000000000000 R14: 0000000000000000 R15: ffff88013341d090
    FS:  0000000000000000(0000) GS:ffff8800bfc00000(0000) knlGS:00000000f7610ab0
    CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    CR2: ffffc90011c08000 CR3: 0000000132f57000 CR4: 00000000000006f0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process work_for_cpu (pid: 1153, threadinfo ffff88013153e000, task ffff8801303c86c0)
    Stack:
     0000000000000005 ffffffff8123ad65 00000000000136c0 ffff88013029c400
     ffff8801303c8998 ffff88013341d000 ffff88013341d090 ffff8801322d9dc8
     ffff88013341d208 0000000000000000 0000000000000000 ffffffff811ad232
    Call Trace:
     [<ffffffff8123ad65>] ? __pm_runtime_set_status+0x162/0x186
     [<ffffffff811ad232>] ? local_pci_probe+0x49/0x92
     [<ffffffff8105afc5>] ? do_work_for_cpu+0x0/0x1b
     [<ffffffff8105afc5>] ? do_work_for_cpu+0x0/0x1b
     [<ffffffff8105afd0>] ? do_work_for_cpu+0xb/0x1b
     [<ffffffff8105fd3f>] ? kthread+0x7a/0x82
     [<ffffffff8100a824>] ? kernel_thread_helper+0x4/0x10
     [<ffffffff8105fcc5>] ? kthread+0x0/0x82
     [<ffffffff8100a820>] ? kernel_thread_helper+0x0/0x10
    Code: f4 01 00 00 ef 31 f6 48 89 df e8 29 dd ff ff 85 c0 0f 88 2b 03 00 00 48 89 ef e8 b4 39 c3 e0 8b 7b 40 e8 fc 9d b1 e0 48 8b 43 38 <66> 8b 10 66 89 14 24 8b 43 14 83 e8 03 83 f8 01 77 32 31 d2 be
    RIP  [<ffffffffa0578402>] azx_probe+0x3ad/0x86b [snd_hda_intel]
     RSP <ffff88013153fe50>
    CR2: ffffc90011c08000
    ---[ end trace 8d1f3ebc136437fd ]---

Trusting the ACPI _CRS information (`pci=use_crs`) fixes this problem.

    $ dmesg | grep -i crs # with the quirk
    PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug

The match has to be against the DMI board entries though since the vendor entries are not populated.

    DMI: System manufacturer System Product Name/M2V-MX SE, BIOS 0304    10/30/2007

This quirk should be removed when `pci=use_crs` is enabled for machines
from 2006 or earlier or some other solution is implemented.

Using coreboot [1] with this board the problem does not exist but this
quirk also does not affect it either. To be safe though the check is
tightened to only take effect when the BIOS from American Megatrends is
used.

        15:13 < ruik> but coreboot does not need that
        15:13 < ruik> because i have there only one root bus
        15:13 < ruik> the audio is behind a bridge

        $ sudo dmidecode
        BIOS Information
                Vendor: American Megatrends Inc.
                Version: 0304
                Release Date: 10/30/2007

[1] http://www.coreboot.org/

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=30552

Cc: stable@kernel.org (2.6.34)
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agonet: fix typos in Documentation/networking/scaling.txt
Benjamin Poirier [Tue, 4 Oct 2011 04:00:30 +0000 (04:00 +0000)]
net: fix typos in Documentation/networking/scaling.txt

The second hunk fixes rps_sock_flow_table but has to re-wrap the paragraph.

Signed-off-by: Benjamin Poirier <benjamin.poirier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agobridge: leave carrier on for empty bridge
stephen hemminger [Mon, 3 Oct 2011 18:14:45 +0000 (18:14 +0000)]
bridge: leave carrier on for empty bridge

This resolves a regression seen by some users of bridging.
Some users use the bridge like a dummy device.
They expect to be able to put an IPv6 address on the device
with no ports attached. Although there are better ways of doing
this, there is no reason to not allow it.

Note: the bridge still will reflect the state of ports in the
bridge if there are any added.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'for-linus' of http://people.redhat.com/agk/git/linux-dm
Linus Torvalds [Thu, 6 Oct 2011 15:31:47 +0000 (08:31 -0700)]
Merge branch 'for-linus' of people.redhat.com/agk/git/linux-dm

* 'for-linus' of http://people.redhat.com/agk/git/linux-dm:
  dm crypt: always disable discard_zeroes_data
  dm: raid fix write_mostly arg validation
  dm table: avoid crash if integrity profile changes
  dm: flakey fix corrupt_bio_byte error path

12 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Thu, 6 Oct 2011 15:30:03 +0000 (08:30 -0700)]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md: Avoid waking up a thread after it has been freed.

12 years agodrm/radeon/kms: use hardcoded dig encoder to transmitter mapping for DCE4.1
Alex Deucher [Wed, 5 Oct 2011 22:36:50 +0000 (18:36 -0400)]
drm/radeon/kms: use hardcoded dig encoder to transmitter mapping for DCE4.1

The encoders are supposedly fully routeable, but changing the mapping
doesn't always seem to take.  Using a hardcoded mapping is much more
reliable.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=41366

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Simon Farnsworth <simon.farnsworth@onelan.co.uk>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agonetfilter: Use proper rwlock init function
Thomas Gleixner [Wed, 5 Oct 2011 03:24:43 +0000 (03:24 +0000)]
netfilter: Use proper rwlock init function

Replace the open coded initialization with the init function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'for-linus' of git://github.com/dtor/input
Linus Torvalds [Wed, 5 Oct 2011 16:22:38 +0000 (09:22 -0700)]
Merge branch 'for-linus' of git://github.com/dtor/input

* 'for-linus' of git://github.com/dtor/input:
  Input: wacom - revert "Cintiq 21UX2 does not have menu strips"

12 years agoMerge git://bedivere.hansenpartnership.com/git/scsi-rc-fixes-2.6
Linus Torvalds [Wed, 5 Oct 2011 16:16:11 +0000 (09:16 -0700)]
Merge git://bedivere.hansenpartnership.com/git/scsi-rc-fixes-2.6

* git://bedivere.hansenpartnership.com/git/scsi-rc-fixes-2.6:
  [SCSI] libsas: fix panic when single phy is disabled on a wide port
  [SCSI] qla2xxx: Fix crash in qla2x00_abort_all_cmds() on unload

12 years agodrm/radeon/kms: fix dp_detect handling for DP bridge chips
Alex Deucher [Tue, 4 Oct 2011 16:23:24 +0000 (12:23 -0400)]
drm/radeon/kms: fix dp_detect handling for DP bridge chips

The HPD pin is not reliable for detecting whether a monitor
is connected or not.  Skip HPD and just use DDC or load
detection.

Fixes phantom VGA connected bugs.

[Michel: fixes phantom VGA bugs on his llano system.]

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>