From: Swapnil Nagle <swapnil.nagle@purestorage.com>
Date: Tue, 14 Jul 2015 20:00:43 +0000 (-0400)
Subject: qla2xxx: cleanup cmd in qla workqueue before processing TMR
X-Git-Tag: omap-for-v4.3/fixes-merge-window~171^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8b2f5ff3d05c2c48b722c3cc67b8226f1601042b;p=pandora-kernel.git

qla2xxx: cleanup cmd in qla workqueue before processing TMR

Since cmds go into qla_tgt_wq and TMRs don't, it's possible that TMR
like TASK_ABORT can be queued over the cmd for which it was meant.
To avoid this race, use a per-port list to keep track of cmds that
are enqueued to qla_tgt_wq but not yet processed. When a TMR arrives,
iterate through this list and remove any cmds that match the TMR.
This patch supports TASK_ABORT and LUN_RESET.

Cc: <stable@vger.kernel.org> # v3.18+
Signed-off-by: Swapnil Nagle <swapnil.nagle@purestorage.com>
Signed-off-by: Alexei Potashnik <alexei@purestorage.com>
Acked-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---

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