From: Sagi Grimberg <sagig@mellanox.com>
Date: Tue, 2 Dec 2014 14:57:26 +0000 (+0200)
Subject: iser-target: Fix connected_handler + teardown flow race
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~16^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19e2090fb246ca21b3e569ead51a6a7a1748eadd;p=pandora-kernel.git

iser-target: Fix connected_handler + teardown flow race

Take isert_conn pointer from cm_id->qp->qp_context. This
will allow us to know that the cm_id context is always
the network portal. This will make the cm_id event check
(connection or network portal) more reliable.

In order to avoid a NULL dereference in cma_id->qp->qp_context
we destroy the qp after we destroy the cm_id (and make the
dereference safe). session stablishment/teardown sequences
can happen in parallel, we should take into account that
connected_handler might race with connection teardown flow.

Also, protect isert_conn->conn_device->active_qps decrement
within the error patch during QP creation failure and the
normal teardown path in isert_connect_release().

Squashed:

iser-target: Decrement completion context active_qps in error flow

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---

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