From: Iyappan Subramanian <isubramanian@apm.com>
Date: Thu, 21 Aug 2014 20:44:48 +0000 (-0700)
Subject: net: xgene: fix possible NULL dereference in xgene_enet_free_desc_rings()
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~24^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c10e4cafa2698dedb9b61bbf6d68f209e779cb19;p=pandora-kernel.git

net: xgene: fix possible NULL dereference in xgene_enet_free_desc_rings()

A NULL pointer dereference is possible for the argument ring->buf_pool
which is passed to xgene_enet_free_desc_ring(), as ring could be NULL.

And now since NULL pointers are being checked for before the calls to
xgene_enet_free_desc_ring(), might as well take advantage of them and
not call the function if the argument would be NULL.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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