tree c58a423318703fc41a61641aef2720d48640f25d
parent 865b58c05b841964f48f574c2027311bd04db8a1
author Li Zhong <zhong@linux.vnet.ibm.com> 1348892617 +0800
committer James Bottomley <JBottomley@Parallels.com> 1349780682 +0100

[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>