From: Roland Dreier <roland@purestorage.com>
Date: Tue, 14 Feb 2012 23:30:31 +0000 (-0800)
Subject: tcm_loop: Set residual field for SCSI commands
X-Git-Tag: v3.2.14~88
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb9ed4f099c534078357b549b53749a55dfd1c97;p=pandora-kernel.git

tcm_loop: Set residual field for SCSI commands

commit 6cf3fa6918baab0c447f1206f1cef9166ad04864 upstream.

If the target core signals an over- or under-run, tcm_loop should call
scsi_set_resid() to tell the SCSI midlayer about the residual data length.

The difference can be seen by doing something like

    strace -eioctl sg_raw -r 1024 /dev/sda 8 0 0 0 1 0 > /dev/null

and looking at the "resid=" part of the SG_IO ioctl -- after this patch,
the field is correctly reported as 512.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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