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authorRusty Russell <rusty@rustcorp.com.au>2011-05-30 11:14:12 -0600
committerRusty Russell <rusty@rustcorp.com.au>2011-05-30 11:14:12 +0930
commit990c91f0af46c57f0291060d928c7ab82f9d5667 (patch)
tree72a347b09509e3658b12d4e013f072bf2b771299 /Documentation/virtual
parentbc805a03c26e1e25171bc627c6264553d27f746c (diff)
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lguest: remove support for VIRTIO_F_NOTIFY_ON_EMPTY.
No virtio device does this any more, so no need to clutter lguest with it. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/lguest/lguest.c20
1 files changed, 1 insertions, 19 deletions
diff --git a/Documentation/virtual/lguest/lguest.c b/Documentation/virtual/lguest/lguest.c
index 711ba9e..cd9d6af 100644
--- a/Documentation/virtual/lguest/lguest.c
+++ b/Documentation/virtual/lguest/lguest.c
@@ -135,9 +135,6 @@ struct device {
/* Is it operational */
bool running;
- /* Does Guest want an intrrupt on empty? */
- bool irq_on_empty;
-
/* Device-specific data. */
void *priv;
};
@@ -637,10 +634,7 @@ static void trigger_irq(struct virtqueue *vq)
/* If they don't want an interrupt, don't send one... */
if (vq->vring.avail->flags & VRING_AVAIL_F_NO_INTERRUPT) {
- /* ... unless they've asked us to force one on empty. */
- if (!vq->dev->irq_on_empty
- || lg_last_avail(vq) != vq->vring.avail->idx)
- return;
+ return;
}
/* Send the Guest an interrupt tell them we used something up. */
@@ -1057,15 +1051,6 @@ static void create_thread(struct virtqueue *vq)
close(vq->eventfd);
}
-static bool accepted_feature(struct device *dev, unsigned int bit)
-{
- const u8 *features = get_feature_bits(dev) + dev->feature_len;
-
- if (dev->feature_len < bit / CHAR_BIT)
- return false;
- return features[bit / CHAR_BIT] & (1 << (bit % CHAR_BIT));
-}
-
static void start_device(struct device *dev)
{
unsigned int i;
@@ -1079,8 +1064,6 @@ static void start_device(struct device *dev)
verbose(" %02x", get_feature_bits(dev)
[dev->feature_len+i]);
- dev->irq_on_empty = accepted_feature(dev, VIRTIO_F_NOTIFY_ON_EMPTY);
-
for (vq = dev->vq; vq; vq = vq->next) {
if (vq->service)
create_thread(vq);
@@ -1564,7 +1547,6 @@ static void setup_tun_net(char *arg)
/* Set up the tun device. */
configure_device(ipfd, tapif, ip);
- add_feature(dev, VIRTIO_F_NOTIFY_ON_EMPTY);
/* Expect Guest to handle everything except UFO */
add_feature(dev, VIRTIO_NET_F_CSUM);
add_feature(dev, VIRTIO_NET_F_GUEST_CSUM);