From: Dan Williams <dan.j.williams@intel.com>
Date: Fri, 18 Nov 2011 01:59:50 +0000 (-0800)
Subject: [SCSI] libsas: remove ata_port.lock management duties from lldds
X-Git-Tag: v3.4-rc1~145^2~63
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=312d3e56119a4bc5c36a96818f87f650c069ddc2;p=pandora-kernel.git

[SCSI] libsas: remove ata_port.lock management duties from lldds

Each libsas driver (mvsas, pm8001, and isci) has invented a different
method for managing the ap->lock.  The lock is held by the ata
->queuecommand() path.  mvsas drops it prior to acquiring any internal
locks which allows it to hold its internal lock across calls to
task->task_done().  This capability is important as it is the only way
the driver can flush task->task_done() instances to guarantee that it no
longer has any in-flight references to a domain_device at
->lldd_dev_gone() time.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

Reading git-diff-tree failed