From: Ralph Campbell <ralph.campbell@qlogic.com>
Date: Tue, 22 Jul 2008 21:18:33 +0000 (-0700)
Subject: IB/sa_query: Check if sm_ah is NULL in ib_sa_remove_one()
X-Git-Tag: v2.6.27-rc1~512^2^3~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64b784b583061ebfe1d484dd1fdc5a26c6d4293f;p=pandora-kernel.git

IB/sa_query: Check if sm_ah is NULL in ib_sa_remove_one()

If update_sm_ah() fails, it leaves the port's sm_ah as NULL.  Then if
the device or module is removed, ib_sa_remove_one() will dereference a
NULL pointer when it calls kref_put().  Fix this by testing if sm_ah
is NULL before dropping the reference.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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