From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-scsi@vger.kernel.org,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH v2 scsi] Short the path length of scsi_cmd_to_driver()
Date: Tue, 02 Oct 2012 18:22:49 -0400 [thread overview]
Message-ID: <yq1626s4ipy.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <1348892617.6455.4.camel@ThinkPad-T420> (Li Zhong's message of "Sat, 29 Sep 2012 12:23:37 +0800")
>>>>> "Li" == Li Zhong <zhong@linux.vnet.ibm.com> writes:
Li> As suggested by James: this patch tries to short the path length of
Li> scsi_cmd_to_driver(). As only REQ_TYPE_BLOCK_PC commands can be
Li> submitted without a driver, so we could avoid the related NULL
Li> checking, as long as we make sure we don't use it for
Li> REQ_TYPE_BLOCK_PC type commands. Plus, this fixes a bug where you
Li> get different behaviors from REQ_TYPE_BLOCK_PC commands when a
Li> driver is and isn't attached.
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
--
Martin K. Petersen Oracle Linux Engineering
prev parent reply other threads:[~2012-10-02 22:22 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-24 5:30 [PATCH scsi] Add NULL checking of return value from scsi_cmd_to_driver() Li Zhong
2012-09-24 5:44 ` James Bottomley
2012-09-24 7:03 ` Li Zhong
2012-09-24 7:35 ` James Bottomley
2012-09-24 9:25 ` Li Zhong
2012-09-24 9:33 ` James Bottomley
2012-09-27 2:02 ` Martin K. Petersen
2012-09-27 4:44 ` James Bottomley
2012-09-27 9:51 ` [PATCH scsi] Short the path length of scsi_cmd_to_driver() Li Zhong
2012-09-27 17:43 ` Martin K. Petersen
2012-09-28 7:13 ` Li Zhong
2012-09-28 7:45 ` James Bottomley
2012-09-27 17:41 ` [PATCH scsi] Add NULL checking of return value from scsi_cmd_to_driver() Martin K. Petersen
2012-09-28 7:48 ` James Bottomley
2012-09-29 4:23 ` [PATCH v2 scsi] Short the path length of scsi_cmd_to_driver() Li Zhong
2012-10-02 22:22 ` Martin K. Petersen [this message]
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