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| author | Chris Metcalf <cmetcalf@tilera.com> | 2010-08-06 10:37:02 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2010-08-06 10:37:02 -0400 |
| commit | ab11b487402f97975f3ac1eeea09c82f4431481e (patch) | |
| tree | 86337c5cbbd2b0c4bd07c0847a1dc7de3d898147 /drivers/virtio | |
| parent | 1c689cbcf2c2b7a35cd237abddd9206bb1b6fee1 (diff) | |
| parent | fc1caf6eafb30ea185720e29f7f5eccca61ecd60 (diff) | |
| download | talos-op-linux-ab11b487402f97975f3ac1eeea09c82f4431481e.tar.gz talos-op-linux-ab11b487402f97975f3ac1eeea09c82f4431481e.zip | |
Merge branch 'master' into for-linus
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index afe7e21dd0ae..1475ed6b575f 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -164,7 +164,8 @@ int virtqueue_add_buf_gfp(struct virtqueue *_vq, gfp_t gfp) { struct vring_virtqueue *vq = to_vvq(_vq); - unsigned int i, avail, head, uninitialized_var(prev); + unsigned int i, avail, uninitialized_var(prev); + int head; START_USE(vq); @@ -174,7 +175,7 @@ int virtqueue_add_buf_gfp(struct virtqueue *_vq, * buffers, then go indirect. FIXME: tune this threshold */ if (vq->indirect && (out + in) > 1 && vq->num_free) { head = vring_add_indirect(vq, sg, out, in, gfp); - if (head != vq->vring.num) + if (likely(head >= 0)) goto add_head; } |
