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authorRusty Russell <rusty@rustcorp.com.au>2008-02-04 23:49:57 -0500
committerRusty Russell <rusty@rustcorp.com.au>2008-02-04 23:49:58 +1100
commit18445c4d501b9ab4336f66ef46b092661ddaf336 (patch)
tree9d23185f207d912942890cf047d1d3200806b401 /drivers/virtio/virtio_ring.c
parenta586d4f6016f7139d8c26df0e6927131168d3b5b (diff)
downloadlinux-18445c4d501b9ab4336f66ef46b092661ddaf336.tar.bz2
virtio: explicit enable_cb/disable_cb rather than callback return.
It seems that virtio_net wants to disable callbacks (interrupts) before calling netif_rx_schedule(), so we can't use the return value to do so. Rename "restart" to "cb_enable" and introduce "cb_disable" hook: callback now returns void, rather than a boolean. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
-rw-r--r--drivers/virtio/virtio_ring.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 1dc04b6684e6..342bb0363fbe 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -220,7 +220,17 @@ static void *vring_get_buf(struct virtqueue *_vq, unsigned int *len)
return ret;
}
-static bool vring_restart(struct virtqueue *_vq)
+static void vring_disable_cb(struct virtqueue *_vq)
+{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+
+ START_USE(vq);
+ BUG_ON(vq->vring.avail->flags & VRING_AVAIL_F_NO_INTERRUPT);
+ vq->vring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
+ END_USE(vq);
+}
+
+static bool vring_enable_cb(struct virtqueue *_vq)
{
struct vring_virtqueue *vq = to_vvq(_vq);
@@ -254,8 +264,8 @@ irqreturn_t vring_interrupt(int irq, void *_vq)
return IRQ_HANDLED;
pr_debug("virtqueue callback for %p (%p)\n", vq, vq->vq.callback);
- if (vq->vq.callback && !vq->vq.callback(&vq->vq))
- vq->vring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
+ if (vq->vq.callback)
+ vq->vq.callback(&vq->vq);
return IRQ_HANDLED;
}
@@ -264,7 +274,8 @@ static struct virtqueue_ops vring_vq_ops = {
.add_buf = vring_add_buf,
.get_buf = vring_get_buf,
.kick = vring_kick,
- .restart = vring_restart,
+ .disable_cb = vring_disable_cb,
+ .enable_cb = vring_enable_cb,
.shutdown = vring_shutdown,
};
@@ -272,7 +283,7 @@ struct virtqueue *vring_new_virtqueue(unsigned int num,
struct virtio_device *vdev,
void *pages,
void (*notify)(struct virtqueue *),
- bool (*callback)(struct virtqueue *))
+ void (*callback)(struct virtqueue *))
{
struct vring_virtqueue *vq;
unsigned int i;