linux-kernel - RE: [PATCH] usb-storage: scsiglue: Changing the command result

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Date:	Tue, 15 Oct 2013 13:02:43 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Vishal Annapurve <vannapurve@...dia.com>
cc:	Ming Lei <tom.leiming@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-usb <linux-usb@...r.kernel.org>
Subject: RE: [PATCH] usb-storage: scsiglue: Changing the command result

On Tue, 15 Oct 2013, Vishal Annapurve wrote:

> Hi Alan,
> 
> This issue seems more related to the devices using SCSI protocol and the
> changes otherwise will be at more places giving the same end result.
> 
> I think as the comment says over the command_abort function,
> intentional result change should only happen in case of timeout.

usb-storage doesn't know _why_ a command was aborted; it knows only 
that the abort occurred.

If you look carefully at the code, you'll see that the result is set to 
DID_ABORT only when the US_FLIDX_TIMED_OUT bit is set, and this bit 
gets set only when a SCSI abort occurs.

Alan Stern

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