From: Eric Dumazet <edumazet@google.com>
Date: Thu, 26 Jun 2014 07:44:02 +0000 (-0700)
Subject: bnx2x: fix possible panic under memory stress
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~289^2~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=07b0f00964def8af9321cfd6c4a7e84f6362f728;p=pandora-kernel.git

bnx2x: fix possible panic under memory stress

While it is legal to kfree(NULL), it is not wise to use :
put_page(virt_to_head_page(NULL))

 BUG: unable to handle kernel paging request at ffffeba400000000
 IP: [<ffffffffc01f5928>] virt_to_head_page+0x36/0x44 [bnx2x]

Reported-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ariel Elior <ariel.elior@qlogic.com>
Fixes: d46d132cc021 ("bnx2x: use netdev_alloc_frag()")
Signed-off-by: David S. Miller <davem@davemloft.net>
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