From 18445c4d501b9ab4336f66ef46b092661ddaf336 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Mon, 4 Feb 2008 23:49:57 -0500 Subject: 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 --- drivers/virtio/virtio_ring.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) (limited to 'drivers/virtio/virtio_ring.c') 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; -- cgit v1.2.3