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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-10 11:12:55 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-10 11:13:53 -0800 |
| commit | 7483948fdd31a8642ef0288aab6f368b98d53c29 (patch) | |
| tree | 031020a5553701d2aae8dddb0fa509aa65854eb1 /drivers/virtio/virtio_ring.c | |
| parent | 22a416c4e0f2179b57028e084ac0ed2c110333bd (diff) | |
| parent | fe250923bbbbcbccc9aa7b84d05ee7a060450534 (diff) | |
| download | linux-7483948fdd31a8642ef0288aab6f368b98d53c29.tar.gz linux-7483948fdd31a8642ef0288aab6f368b98d53c29.tar.bz2 linux-7483948fdd31a8642ef0288aab6f368b98d53c29.zip | |
Merge tag 'usb-3.3-rc3' into usb-next
This is done to resolve a merge conflict with:
drivers/usb/class/cdc-wdm.c
and to better handle future patches for this driver as it is under
active development at the moment.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 79e1b292c030..5aa43c3392a2 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -35,7 +35,7 @@ #define virtio_rmb(vq) \ do { if ((vq)->weak_barriers) smp_rmb(); else rmb(); } while(0) #define virtio_wmb(vq) \ - do { if ((vq)->weak_barriers) smp_rmb(); else rmb(); } while(0) + do { if ((vq)->weak_barriers) smp_wmb(); else wmb(); } while(0) #else /* We must force memory ordering even if guest is UP since host could be * running on another CPU, but SMP barriers are defined to barrier() in that @@ -308,9 +308,9 @@ bool virtqueue_kick_prepare(struct virtqueue *_vq) bool needs_kick; START_USE(vq); - /* Descriptors and available array need to be set before we expose the - * new available array entries. */ - virtio_wmb(vq); + /* We need to expose available array entries before checking avail + * event. */ + virtio_mb(vq); old = vq->vring.avail->idx - vq->num_added; new = vq->vring.avail->idx; |