From: Li Zhong <zhong@linux.vnet.ibm.com>
Date: Sat, 29 Sep 2012 04:23:37 +0000 (+0800)
Subject: [SCSI] Shorten the path length of scsi_cmd_to_driver()
X-Git-Tag: v3.7-rc1~22^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=329a402cb052b233bc92aa34c4caf2f7dfb2d76e;p=pandora-kernel.git

[SCSI] Shorten the path length of scsi_cmd_to_driver()

This patch tries to shorten the path length of scsi_cmd_to_driver(). As only
REQ_TYPE_BLOCK_PC commands can be submitted without a driver, so we could
avoid the related NULL checking, as long as we make sure we don't use it for
REQ_TYPE_BLOCK_PC type commands. Plus, this fixes a bug where you get
different behaviors from REQ_TYPE_BLOCK_PC commands when a driver is and isn't
attached.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

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