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virtio_blk: verify if queue is broken after virtqueue_get_buf()
author
Heinz Graalfs
<graalfs@linux.vnet.ibm.com>
Mon, 28 Oct 2013 23:10:30 +0000
(09:40 +1030)
committer
Rusty Russell
<rusty@rustcorp.com.au>
Tue, 29 Oct 2013 00:58:17 +0000
(11:28 +1030)
In case virtqueue_get_buf() returned with a NULL pointer verify if the
virtqueue is broken in order to leave while loop.
Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
drivers/block/virtio_blk.c
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diff --git
a/drivers/block/virtio_blk.c
b/drivers/block/virtio_blk.c
index 6b66252fc4e680a03213a2c927e04e4df7faa885..f3be496ac8fa7d7e445aeeb91560d86810f17a5c 100644
(file)
--- a/
drivers/block/virtio_blk.c
+++ b/
drivers/block/virtio_blk.c
@@
-292,6
+292,8
@@
static void virtblk_done(struct virtqueue *vq)
req_done = true;
}
}
+ if (unlikely(virtqueue_is_broken(vq)))
+ break;
} while (!virtqueue_enable_cb(vq));
/* In case queue is stopped waiting for more buffers. */
if (req_done)
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