From: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Date: Mon, 11 Nov 2013 01:22:43 +0000 (+1030)
Subject: virtio_scsi: verify if queue is broken after virtqueue_get_buf()
X-Git-Tag: v3.13-rc1~82^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2bf4fd31394a3f875ea093ee8a209f30b378cbf3;p=pandora-kernel.git

virtio_scsi: verify if queue is broken after virtqueue_get_buf()

If virtqueue_get_buf() returned with a NULL pointer avoid a possibly
endless loop by checking for a broken virtqueue.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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