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virtio_blk: verify if queue is broken after virtqueue_get_buf()

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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>
This commit is contained in:
Heinz Graalfs 2013-10-29 09:40:30 +10:30 committed by Rusty Russell
parent b3b32c9413
commit 7f03b17d5c
1 changed files with 2 additions and 0 deletions
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2
drivers/block/virtio_blk.c
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@ -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)