From: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Date: Fri, 12 Jul 2013 00:18:58 +0000 (-0700)
Subject: isci: Fix a race condition in the SSP task management path
X-Git-Tag: v3.2.50~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6af864ccfe6d6d079db3e488b77b95fa65eb7799;p=pandora-kernel.git

isci: Fix a race condition in the SSP task management path

commit 96f15f29038e58e1b0a96483e2b369ff446becf1 upstream.

This commit fixes a race condition in the isci driver abort task and SSP
device task management path.  The race is caused when an I/O termination
in the SCU hardware is necessary because of an SSP target timeout condition,
and the check of the I/O end state races against the HW-termination-driven
end state.  The failure of the race meant that no TMF was sent to the device
to clean-up the pending I/O.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Reviewed-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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