virtio_blk: verify if queue is broken after virtqueue_get_buf()
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>
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@ -292,6 +292,8 @@ static void virtblk_done(struct virtqueue *vq)
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req_done = true;
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}
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}
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if (unlikely(virtqueue_is_broken(vq)))
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break;
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} while (!virtqueue_enable_cb(vq));
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/* In case queue is stopped waiting for more buffers. */
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if (req_done)
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