usb-storage: separate dynamic flags from fixed flags

This patch (as1089) separates out the dynamic atomic bitflags and the
static bitfields in usb-storage.  Until now the two sorts of flags
have been sharing the same word; this has always been awkward.

To help prevent possible confusion, the two new fields each have a
different name from the original.  us->fflags contains the fixed
bitfields (mostly taken from the USB ID table in unusual_devs.h), and
us->dflags contains the dynamic atomic bitflags (used with set_bit,
test_bit, and so on).

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/storage/isd200.c b/drivers/usb/storage/isd200.c
index 3addcd8..a153335 100644 (file)
--- a/drivers/usb/storage/isd200.c
+++ b/drivers/usb/storage/isd200.c
@@ -586,7 +586,7 @@ static void isd200_invoke_transport( struct us_data *us,
        /* if the command gets aborted by the higher layers, we need to
         * short-circuit all other processing
         */
-       if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
+       if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
                US_DEBUGP("-- command was aborted\n");
                goto Handle_Abort;
        }
@@ -633,7 +633,7 @@ static void isd200_invoke_transport( struct us_data *us,
 
        if (need_auto_sense) {
                result = isd200_read_regs(us);
-               if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
+               if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
                        US_DEBUGP("-- auto-sense aborted\n");
                        goto Handle_Abort;
                }
@@ -663,7 +663,7 @@ static void isd200_invoke_transport( struct us_data *us,
        srb->result = DID_ABORT << 16;
 
        /* permit the reset transfer to take place */
-       clear_bit(US_FLIDX_ABORTING, &us->flags);
+       clear_bit(US_FLIDX_ABORTING, &us->dflags);
        /* Need reset here */
 }
 

diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 3fcde9f..1caf3f7 100644 (file)
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -116,10 +116,10 @@ static int slave_configure(struct scsi_device *sdev)
         * while others have trouble with more than 64K. At this time we
         * are limiting both to 32K (64 sectores).
         */
-       if (us->flags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) {
+       if (us->fflags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) {
                unsigned int max_sectors = 64;
 
-               if (us->flags & US_FL_MAX_SECTORS_MIN)
+               if (us->fflags & US_FL_MAX_SECTORS_MIN)
                        max_sectors = PAGE_CACHE_SIZE >> 9;
                if (sdev->request_queue->max_sectors > max_sectors)
                        blk_queue_max_sectors(sdev->request_queue,
@@ -148,7 +148,7 @@ static int slave_configure(struct scsi_device *sdev)
                 * majority of devices work fine, but a few still can't
                 * handle it.  The sd driver will simply assume those
                 * devices are write-enabled. */
-               if (us->flags & US_FL_NO_WP_DETECT)
+               if (us->fflags & US_FL_NO_WP_DETECT)
                        sdev->skip_ms_page_3f = 1;
 
                /* A number of devices have problems with MODE SENSE for
@@ -158,13 +158,13 @@ static int slave_configure(struct scsi_device *sdev)
                /* Some disks return the total number of blocks in response
                 * to READ CAPACITY rather than the highest block number.
                 * If this device makes that mistake, tell the sd driver. */
-               if (us->flags & US_FL_FIX_CAPACITY)
+               if (us->fflags & US_FL_FIX_CAPACITY)
                        sdev->fix_capacity = 1;
 
                /* A few disks have two indistinguishable version, one of
                 * which reports the correct capacity and the other does not.
                 * The sd driver has to guess which is the case. */
-               if (us->flags & US_FL_CAPACITY_HEURISTICS)
+               if (us->fflags & US_FL_CAPACITY_HEURISTICS)
                        sdev->guess_capacity = 1;
 
                /* Some devices report a SCSI revision level above 2 but are
@@ -213,7 +213,7 @@ static int slave_configure(struct scsi_device *sdev)
 
        /* Some devices choke when they receive a PREVENT-ALLOW MEDIUM
         * REMOVAL command, so suppress those commands. */
-       if (us->flags & US_FL_NOT_LOCKABLE)
+       if (us->fflags & US_FL_NOT_LOCKABLE)
                sdev->lockable = 0;
 
        /* this is to satisfy the compiler, tho I don't think the 
@@ -238,7 +238,7 @@ static int queuecommand(struct scsi_cmnd *srb,
        }
 
        /* fail the command if we are disconnecting */
-       if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+       if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
                US_DEBUGP("Fail command during disconnect\n");
                srb->result = DID_NO_CONNECT << 16;
                done(srb);
@@ -280,9 +280,9 @@ static int command_abort(struct scsi_cmnd *srb)
         * with the reset).  Note that we must retain the host lock while
         * calling usb_stor_stop_transport(); otherwise it might interfere
         * with an auto-reset that begins as soon as we release the lock. */
-       set_bit(US_FLIDX_TIMED_OUT, &us->flags);
-       if (!test_bit(US_FLIDX_RESETTING, &us->flags)) {
-               set_bit(US_FLIDX_ABORTING, &us->flags);
+       set_bit(US_FLIDX_TIMED_OUT, &us->dflags);
+       if (!test_bit(US_FLIDX_RESETTING, &us->dflags)) {
+               set_bit(US_FLIDX_ABORTING, &us->dflags);
                usb_stor_stop_transport(us);
        }
        scsi_unlock(us_to_host(us));
@@ -329,7 +329,7 @@ void usb_stor_report_device_reset(struct us_data *us)
        struct Scsi_Host *host = us_to_host(us);
 
        scsi_report_device_reset(host, 0, 0);
-       if (us->flags & US_FL_SCM_MULT_TARG) {
+       if (us->fflags & US_FL_SCM_MULT_TARG) {
                for (i = 1; i < host->max_id; ++i)
                        scsi_report_device_reset(host, 0, i);
        }
@@ -400,7 +400,7 @@ static int proc_info (struct Scsi_Host *host, char *buffer,
                pos += sprintf(pos, "       Quirks:");
 
 #define US_FLAG(name, value) \
-       if (us->flags & value) pos += sprintf(pos, " " #name);
+       if (us->fflags & value) pos += sprintf(pos, " " #name);
 US_DO_ALL_FLAGS
 #undef US_FLAG
 

diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index 6610d2d..2f88bb9 100644 (file)
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -75,14 +75,14 @@
  * by a separate code path.)
  *
  * The abort function (usb_storage_command_abort() in scsiglue.c) first
- * sets the machine state and the ABORTING bit in us->flags to prevent
+ * sets the machine state and the ABORTING bit in us->dflags to prevent
  * new URBs from being submitted.  It then calls usb_stor_stop_transport()
- * below, which atomically tests-and-clears the URB_ACTIVE bit in us->flags
+ * below, which atomically tests-and-clears the URB_ACTIVE bit in us->dflags
  * to see if the current_urb needs to be stopped.  Likewise, the SG_ACTIVE
  * bit is tested to see if the current_sg scatter-gather request needs to be
  * stopped.  The timeout callback routine does much the same thing.
  *
- * When a disconnect occurs, the DISCONNECTING bit in us->flags is set to
+ * When a disconnect occurs, the DISCONNECTING bit in us->dflags is set to
  * prevent new URBs from being submitted, and usb_stor_stop_transport() is
  * called to stop any ongoing requests.
  *
@@ -128,7 +128,7 @@ static int usb_stor_msg_common(struct us_data *us, int timeout)
        int status;
 
        /* don't submit URBs during abort/disconnect processing */
-       if (us->flags & ABORTING_OR_DISCONNECTING)
+       if (us->dflags & ABORTING_OR_DISCONNECTING)
                return -EIO;
 
        /* set up data structures for the wakeup system */
@@ -159,13 +159,13 @@ static int usb_stor_msg_common(struct us_data *us, int timeout)
 
        /* since the URB has been submitted successfully, it's now okay
         * to cancel it */
-       set_bit(US_FLIDX_URB_ACTIVE, &us->flags);
+       set_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
 
        /* did an abort/disconnect occur during the submission? */
-       if (us->flags & ABORTING_OR_DISCONNECTING) {
+       if (us->dflags & ABORTING_OR_DISCONNECTING) {
 
                /* cancel the URB, if it hasn't been cancelled already */
-               if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->flags)) {
+               if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) {
                        US_DEBUGP("-- cancelling URB\n");
                        usb_unlink_urb(us->current_urb);
                }
@@ -175,7 +175,7 @@ static int usb_stor_msg_common(struct us_data *us, int timeout)
        timeleft = wait_for_completion_interruptible_timeout(
                        &urb_done, timeout ? : MAX_SCHEDULE_TIMEOUT);
  
-       clear_bit(US_FLIDX_URB_ACTIVE, &us->flags);
+       clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
 
        if (timeleft <= 0) {
                US_DEBUGP("%s -- cancelling URB\n",
@@ -420,7 +420,7 @@ static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe,
        int result;
 
        /* don't submit s-g requests during abort/disconnect processing */
-       if (us->flags & ABORTING_OR_DISCONNECTING)
+       if (us->dflags & ABORTING_OR_DISCONNECTING)
                return USB_STOR_XFER_ERROR;
 
        /* initialize the scatter-gather request block */
@@ -435,13 +435,13 @@ static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe,
 
        /* since the block has been initialized successfully, it's now
         * okay to cancel it */
-       set_bit(US_FLIDX_SG_ACTIVE, &us->flags);
+       set_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
 
        /* did an abort/disconnect occur during the submission? */
-       if (us->flags & ABORTING_OR_DISCONNECTING) {
+       if (us->dflags & ABORTING_OR_DISCONNECTING) {
 
                /* cancel the request, if it hasn't been cancelled already */
-               if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->flags)) {
+               if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) {
                        US_DEBUGP("-- cancelling sg request\n");
                        usb_sg_cancel(&us->current_sg);
                }
@@ -449,7 +449,7 @@ static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe,
 
        /* wait for the completion of the transfer */
        usb_sg_wait(&us->current_sg);
-       clear_bit(US_FLIDX_SG_ACTIVE, &us->flags);
+       clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
 
        result = us->current_sg.status;
        if (act_len)
@@ -530,7 +530,7 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
        /* if the command gets aborted by the higher layers, we need to
         * short-circuit all other processing
         */
-       if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
+       if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
                US_DEBUGP("-- command was aborted\n");
                srb->result = DID_ABORT << 16;
                goto Handle_Errors;
@@ -616,7 +616,7 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
                /* let's clean up right away */
                scsi_eh_restore_cmnd(srb, &ses);
 
-               if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
+               if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
                        US_DEBUGP("-- auto-sense aborted\n");
                        srb->result = DID_ABORT << 16;
                        goto Handle_Errors;
@@ -629,7 +629,7 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
                         * auto-sense is perfectly valid
                         */
                        srb->result = DID_ERROR << 16;
-                       if (!(us->flags & US_FL_SCM_MULT_TARG))
+                       if (!(us->fflags & US_FL_SCM_MULT_TARG))
                                goto Handle_Errors;
                        return;
                }
@@ -679,8 +679,8 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
        /* Set the RESETTING bit, and clear the ABORTING bit so that
         * the reset may proceed. */
        scsi_lock(us_to_host(us));
-       set_bit(US_FLIDX_RESETTING, &us->flags);
-       clear_bit(US_FLIDX_ABORTING, &us->flags);
+       set_bit(US_FLIDX_RESETTING, &us->dflags);
+       clear_bit(US_FLIDX_ABORTING, &us->dflags);
        scsi_unlock(us_to_host(us));
 
        /* We must release the device lock because the pre_reset routine
@@ -695,7 +695,7 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
                scsi_unlock(us_to_host(us));
                us->transport_reset(us);
        }
-       clear_bit(US_FLIDX_RESETTING, &us->flags);
+       clear_bit(US_FLIDX_RESETTING, &us->dflags);
 }
 
 /* Stop the current URB transfer */
@@ -707,13 +707,13 @@ void usb_stor_stop_transport(struct us_data *us)
         * let's wake it up.  The test_and_clear_bit() call
         * guarantees that if a URB has just been submitted,
         * it won't be cancelled more than once. */
-       if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->flags)) {
+       if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) {
                US_DEBUGP("-- cancelling URB\n");
                usb_unlink_urb(us->current_urb);
        }
 
        /* If we are waiting for a scatter-gather operation, cancel it. */
-       if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->flags)) {
+       if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) {
                US_DEBUGP("-- cancelling sg request\n");
                usb_sg_cancel(&us->current_sg);
        }
@@ -914,7 +914,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
        unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
 
        /* Take care of BULK32 devices; set extra byte to 0 */
-       if ( unlikely(us->flags & US_FL_BULK32)) {
+       if (unlikely(us->fflags & US_FL_BULK32)) {
                cbwlen = 32;
                us->iobuf[31] = 0;
        }
@@ -925,7 +925,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
        bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0;
        bcb->Tag = ++us->tag;
        bcb->Lun = srb->device->lun;
-       if (us->flags & US_FL_SCM_MULT_TARG)
+       if (us->fflags & US_FL_SCM_MULT_TARG)
                bcb->Lun |= srb->device->id << 4;
        bcb->Length = srb->cmd_len;
 
@@ -951,7 +951,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
        /* Some USB-IDE converter chips need a 100us delay between the
         * command phase and the data phase.  Some devices need a little
         * more than that, probably because of clock rate inaccuracies. */
-       if (unlikely(us->flags & US_FL_GO_SLOW))
+       if (unlikely(us->fflags & US_FL_GO_SLOW))
                udelay(125);
 
        if (transfer_length) {
@@ -1010,7 +1010,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
        US_DEBUGP("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n",
                        le32_to_cpu(bcs->Signature), bcs->Tag, 
                        residue, bcs->Status);
-       if (!(bcs->Tag == us->tag || (us->flags & US_FL_BULK_IGNORE_TAG)) ||
+       if (!(bcs->Tag == us->tag || (us->fflags & US_FL_BULK_IGNORE_TAG)) ||
                bcs->Status > US_BULK_STAT_PHASE) {
                US_DEBUGP("Bulk logical error\n");
                return USB_STOR_TRANSPORT_ERROR;
@@ -1035,7 +1035,7 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
        /* try to compute the actual residue, based on how much data
         * was really transferred and what the device tells us */
        if (residue) {
-               if (!(us->flags & US_FL_IGNORE_RESIDUE)) {
+               if (!(us->fflags & US_FL_IGNORE_RESIDUE)) {
                        residue = min(residue, transfer_length);
                        scsi_set_resid(srb, max(scsi_get_resid(srb),
                                                               (int) residue));
@@ -1090,7 +1090,7 @@ static int usb_stor_reset_common(struct us_data *us,
        int result;
        int result2;
 
-       if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+       if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
                US_DEBUGP("No reset during disconnect\n");
                return -EIO;
        }
@@ -1103,12 +1103,12 @@ static int usb_stor_reset_common(struct us_data *us,
                return result;
        }
 
-       /* Give the device some time to recover from the reset,
-        * but don't delay disconnect processing. */
-       wait_event_interruptible_timeout(us->delay_wait,
-                       test_bit(US_FLIDX_DISCONNECTING, &us->flags),
-                       HZ*6);
-       if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+       /* Give the device some time to recover from the reset,
+        * but don't delay disconnect processing. */
+       wait_event_interruptible_timeout(us->delay_wait,
+                       test_bit(US_FLIDX_DISCONNECTING, &us->dflags),
+                       HZ*6);
+       if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
                US_DEBUGP("Reset interrupted by disconnect\n");
                return -EIO;
        }
@@ -1170,7 +1170,7 @@ int usb_stor_port_reset(struct us_data *us)
                US_DEBUGP("unable to lock device for reset: %d\n", result);
        else {
                /* Were we disconnected while waiting for the lock? */
-               if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+               if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
                        result = -EIO;
                        US_DEBUGP("No reset during disconnect\n");
                } else {

diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index e268aac..78c0c7e 100644 (file)
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -321,7 +321,7 @@ static int usb_stor_control_thread(void * __us)
                mutex_lock(&(us->dev_mutex));
 
                /* if the device has disconnected, we are free to exit */
-               if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+               if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
                        US_DEBUGP("-- exiting\n");
                        mutex_unlock(&us->dev_mutex);
                        break;
@@ -331,7 +331,7 @@ static int usb_stor_control_thread(void * __us)
                scsi_lock(host);
 
                /* has the command timed out *already* ? */
-               if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
+               if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
                        us->srb->result = DID_ABORT << 16;
                        goto SkipForAbort;
                }
@@ -350,7 +350,7 @@ static int usb_stor_control_thread(void * __us)
                 * the maximum known LUN
                 */
                else if (us->srb->device->id && 
-                               !(us->flags & US_FL_SCM_MULT_TARG)) {
+                               !(us->fflags & US_FL_SCM_MULT_TARG)) {
                        US_DEBUGP("Bad target number (%d:%d)\n",
                                  us->srb->device->id, us->srb->device->lun);
                        us->srb->result = DID_BAD_TARGET << 16;
@@ -365,7 +365,7 @@ static int usb_stor_control_thread(void * __us)
                /* Handle those devices which need us to fake 
                 * their inquiry data */
                else if ((us->srb->cmnd[0] == INQUIRY) &&
-                           (us->flags & US_FL_FIX_INQUIRY)) {
+                           (us->fflags & US_FL_FIX_INQUIRY)) {
                        unsigned char data_ptr[36] = {
                            0x00, 0x80, 0x02, 0x02,
                            0x1F, 0x00, 0x00, 0x00};
@@ -403,12 +403,12 @@ SkipForAbort:
                 * the TIMED_OUT flag, not srb->result == DID_ABORT, because
                 * the timeout might have occurred after the command had
                 * already completed with a different result code. */
-               if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) {
+               if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
                        complete(&(us->notify));
 
                        /* Allow USB transfers to resume */
-                       clear_bit(US_FLIDX_ABORTING, &us->flags);
-                       clear_bit(US_FLIDX_TIMED_OUT, &us->flags);
+                       clear_bit(US_FLIDX_ABORTING, &us->dflags);
+                       clear_bit(US_FLIDX_TIMED_OUT, &us->dflags);
                }
 
                /* finished working on this command */
@@ -500,9 +500,9 @@ static int get_device_info(struct us_data *us, const struct usb_device_id *id)
        us->protocol = (unusual_dev->useTransport == US_PR_DEVICE) ?
                        idesc->bInterfaceProtocol :
                        unusual_dev->useTransport;
-       us->flags = USB_US_ORIG_FLAGS(id->driver_info);
+       us->fflags = USB_US_ORIG_FLAGS(id->driver_info);
 
-       if (us->flags & US_FL_IGNORE_DEVICE) {
+       if (us->fflags & US_FL_IGNORE_DEVICE) {
                printk(KERN_INFO USB_STORAGE "device ignored\n");
                return -ENODEV;
        }
@@ -512,7 +512,7 @@ static int get_device_info(struct us_data *us, const struct usb_device_id *id)
         * disable it if we're in full-speed
         */
        if (dev->speed != USB_SPEED_HIGH)
-               us->flags &= ~US_FL_GO_SLOW;
+               us->fflags &= ~US_FL_GO_SLOW;
 
        /* Log a message if a non-generic unusual_dev entry contains an
         * unnecessary subclass or protocol override.  This may stimulate
@@ -533,7 +533,7 @@ static int get_device_info(struct us_data *us, const struct usb_device_id *id)
                if (unusual_dev->useTransport != US_PR_DEVICE &&
                        us->protocol == idesc->bInterfaceProtocol)
                        msg += 2;
-               if (msg >= 0 && !(us->flags & US_FL_NEED_OVERRIDE))
+               if (msg >= 0 && !(us->fflags & US_FL_NEED_OVERRIDE))
                        printk(KERN_NOTICE USB_STORAGE "This device "
                                "(%04x,%04x,%04x S %02x P %02x)"
                                " has %s in unusual_devs.h (kernel"
@@ -663,7 +663,7 @@ static int get_transport(struct us_data *us)
        US_DEBUGP("Transport: %s\n", us->transport_name);
 
        /* fix for single-lun devices */
-       if (us->flags & US_FL_SINGLE_LUN)
+       if (us->fflags & US_FL_SINGLE_LUN)
                us->max_lun = 0;
        return 0;
 }
@@ -824,7 +824,7 @@ static void usb_stor_release_resources(struct us_data *us)
         * any more commands.
         */
        US_DEBUGP("-- sending exit command to thread\n");
-       set_bit(US_FLIDX_DISCONNECTING, &us->flags);
+       set_bit(US_FLIDX_DISCONNECTING, &us->dflags);
        up(&us->sema);
        if (us->ctl_thread)
                kthread_stop(us->ctl_thread);
@@ -868,7 +868,7 @@ static void quiesce_and_remove_host(struct us_data *us)
        /* Prevent new USB transfers, stop the current command, and
         * interrupt a SCSI-scan or device-reset delay */
        scsi_lock(host);
-       set_bit(US_FLIDX_DISCONNECTING, &us->flags);
+       set_bit(US_FLIDX_DISCONNECTING, &us->dflags);
        scsi_unlock(host);
        usb_stor_stop_transport(us);
        wake_up(&us->delay_wait);
@@ -919,16 +919,16 @@ static int usb_stor_scan_thread(void * __us)
                printk(KERN_DEBUG "usb-storage: waiting for device "
                                "to settle before scanning\n");
                wait_event_freezable_timeout(us->delay_wait,
-                               test_bit(US_FLIDX_DISCONNECTING, &us->flags),
+                               test_bit(US_FLIDX_DISCONNECTING, &us->dflags),
                                delay_use * HZ);
        }
 
        /* If the device is still connected, perform the scanning */
-       if (!test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+       if (!test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
 
                /* For bulk-only devices, determine the max LUN value */
                if (us->protocol == US_PR_BULK &&
-                               !(us->flags & US_FL_SINGLE_LUN)) {
+                               !(us->fflags & US_FL_SINGLE_LUN)) {
                        mutex_lock(&us->dev_mutex);
                        us->max_lun = usb_stor_Bulk_max_lun(us);
                        mutex_unlock(&us->dev_mutex);

diff --git a/drivers/usb/storage/usb.h b/drivers/usb/storage/usb.h
index 8d87503..b169132 100644 (file)
--- a/drivers/usb/storage/usb.h
+++ b/drivers/usb/storage/usb.h
@@ -67,15 +67,15 @@ struct us_unusual_dev {
 };
 
 
-/* Dynamic flag definitions: used in set_bit() etc. */
-#define US_FLIDX_URB_ACTIVE    18  /* 0x00040000  current_urb is in use  */
-#define US_FLIDX_SG_ACTIVE     19  /* 0x00080000  current_sg is in use   */
-#define US_FLIDX_ABORTING      20  /* 0x00100000  abort is in progress   */
-#define US_FLIDX_DISCONNECTING 21  /* 0x00200000  disconnect in progress */
+/* Dynamic bitflag definitions (us->dflags): used in set_bit() etc. */
+#define US_FLIDX_URB_ACTIVE    0       /* current_urb is in use    */
+#define US_FLIDX_SG_ACTIVE     1       /* current_sg is in use     */
+#define US_FLIDX_ABORTING      2       /* abort is in progress     */
+#define US_FLIDX_DISCONNECTING 3       /* disconnect in progress   */
 #define ABORTING_OR_DISCONNECTING      ((1UL << US_FLIDX_ABORTING) | \
                                         (1UL << US_FLIDX_DISCONNECTING))
-#define US_FLIDX_RESETTING     22  /* 0x00400000  device reset in progress */
-#define US_FLIDX_TIMED_OUT     23  /* 0x00800000  SCSI midlayer timed out  */
+#define US_FLIDX_RESETTING     4       /* device reset in progress */
+#define US_FLIDX_TIMED_OUT     5       /* SCSI midlayer timed out  */
 
 
 #define USB_STOR_STRING_LEN 32
@@ -109,7 +109,8 @@ struct us_data {
        struct usb_device       *pusb_dev;       /* this usb_device */
        struct usb_interface    *pusb_intf;      /* this interface */
        struct us_unusual_dev   *unusual_dev;    /* device-filter entry     */
-       unsigned long           flags;           /* from filter initially */
+       unsigned long           fflags;          /* fixed flags from filter */
+       unsigned long           dflags;          /* dynamic atomic bitflags */
        unsigned int            send_bulk_pipe;  /* cached pipe values */
        unsigned int            recv_bulk_pipe;
        unsigned int            send_ctrl_pipe;