linux-kernel - Re: [PATCH v2 scsi] Short the path length of scsi_cmd_to

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Message-ID: <yq1626s4ipy.fsf@sermon.lab.mkp.net>
Date:	Tue, 02 Oct 2012 18:22:49 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Li Zhong <zhong@...ux.vnet.ibm.com>
Cc:	James Bottomley <James.Bottomley@...senpartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-scsi@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2 scsi] Short the path length of scsi_cmd_to_driver()

>>>>> "Li" == Li Zhong <zhong@...ux.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@...cle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering
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