From: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Date: Mon, 28 Oct 2013 23:10:11 +0000 (+1030)
Subject: virtio_test: verify if virtqueue_kick() succeeded
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=53c18c990644174935ca93e50d7ebd05e04cb9ee;p=deliverable%2Flinux.git

virtio_test: verify if virtqueue_kick() succeeded

Verify if a host kick succeeded by checking return value of virtqueue_kick().

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

diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index 059cb723f6a7..bdb71a26ae35 100644
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -172,7 +172,8 @@ static void run_test(struct vdev_info *dev, struct vq_info *vq,
 							 GFP_ATOMIC);
 				if (likely(r == 0)) {
 					++started;
-					virtqueue_kick(vq->vq);
+					if (unlikely(!virtqueue_kick(vq->vq))
+						r = -1;
 				}
 			} else
 				r = -1;