From: Michael S. Tsirkin <mst@redhat.com>
Date: Mon, 26 Jul 2010 07:25:30 +0000 (+0930)
Subject: virtio: fix oops on OOM
X-Git-Tag: v2.6.35~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1fe9b6fef11771461e69ecd1bc8935a1c7c90cb5;p=pandora-kernel.git

virtio: fix oops on OOM

virtio ring was changed to return an error code on OOM,
but one caller was missed and still checks for vq->vring.num.
The fix is just to check for <0 error code.

Long term it might make sense to change goto add_head to
just return an error on oom instead, but let's apply
a minimal fix for 2.6.35.

Reported-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Tested-by: Chris Mason <chris.mason@oracle.com>
Cc: stable@kernel.org # .34.x
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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