linux-kernel - Re: [PATCH] libata: fix shutdown warning message printing

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Message-ID: <464A94F9.5030300@garzik.org>
Date:	Wed, 16 May 2007 01:22:01 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Tejun Heo <htejun@...il.com>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	IDE/ATA development list <linux-ide@...r.kernel.org>,
	James Bottomley <James.Bottomley@...elEye.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] libata: fix shutdown warning message printing

Tejun Heo wrote:
> Unlocking ap->lock and ssleeping don't work because SCSI commands can
> be issued from completion path without context.  Reimplement delayed
> completion by allowing translation functions to override
> qc->scsidone(), storing the original completion function to
> scmd->scsi_done() and overriding qc->scsidone() with a function which
> schedules delayed invocation of scmd->scsi_done().
> 
> This isn't pretty at all but all the ugly parts are thankfully
> contained in the stop translation path where the compat feature is
> implemented.
> 
> Signed-off-by: Tejun Heo <htejun@...il.com>

applied to #upstream-fixes


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