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virtio_console: verify if queue is broken after virtqueue_get_buf()
authorHeinz Graalfs <graalfs@linux.vnet.ibm.com>
Mon, 28 Oct 2013 23:10:39 +0000 (09:40 +1030)
committerRusty Russell <rusty@rustcorp.com.au>
Tue, 29 Oct 2013 00:58:18 +0000 (11:28 +1030)
If virtqueue_get_buf() returns with a NULL pointer it should be verified
if the virtqueue is broken, in order to avoid loop calling cpu_relax().

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

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