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| author | NeilBrown <neilb@suse.de> | 2010-08-10 02:02:33 +0200 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2010-08-10 02:02:33 +0200 |
| commit | fd8aa2c1811bf60ccb2d5de0579c6f62aec1772d (patch) | |
| tree | 311567d03758afc3a93b4273fe172836e89bb01d /drivers/virtio/virtio_ring.c | |
| parent | md: clean up do_md_stop (diff) | |
| parent | Merge branch 'async' of macbook:git/btrfs-unstable (diff) | |
| download | linux-fd8aa2c1811bf60ccb2d5de0579c6f62aec1772d.tar.xz linux-fd8aa2c1811bf60ccb2d5de0579c6f62aec1772d.zip | |
Merge git://git.infradead.org/users/dwmw2/libraid-2.6 into for-linus
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
| -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; } |