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authorLinus Torvalds <torvalds@linux-foundation.org>2010-07-07 19:56:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-07-07 19:56:00 -0700
commit2aa72f612144a0a7d4b0b22ae7c122692ac6a013 (patch)
tree8af2d2ac975887a04b4e4109de3d785f7046979b /drivers/vhost/net.c
parent78178c7d6e127fff6dba027315fd6914304b05cf (diff)
parent33b665eeeb85956ccbdf31c4c31a4e2a31133c44 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (35 commits) NET: SB1250: Initialize .owner vxge: show startup message with KERN_INFO ll_temac: Fix missing iounmaps bridge: Clear IPCB before possible entry into IP stack bridge br_multicast: BUG: unable to handle kernel NULL pointer dereference net: Fix definition of netif_vdbg() when VERBOSE_DEBUG is defined net/ne: fix memory leak in ne_drv_probe() xfrm: fix xfrm by MARK logic virtio_net: fix oom handling on tx virtio_net: do not reschedule rx refill forever s2io: resolve statistics issues linux/net.h: fix kernel-doc warnings net: decreasing real_num_tx_queues needs to flush qdisc sched: qdisc_reset_all_tx is calling qdisc_reset without qdisc_lock qlge: fix a eeh handler to not add a pending timer qlge: Replacing add_timer() to mod_timer() usbnet: Set parent device early for netdev_printk() net: Revert "rndis_host: Poll status channel before control channel" netfilter: ip6t_REJECT: fix a dst leak in ipv6 REJECT drivers: bluetooth: bluecard_cs.c: Fixed include error, changed to linux/io.h ...
Diffstat (limited to 'drivers/vhost/net.c')
-rw-r--r--drivers/vhost/net.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index df5b6b971f26..57a593c58cf4 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -98,7 +98,8 @@ static void tx_poll_start(struct vhost_net *net, struct socket *sock)
static void handle_tx(struct vhost_net *net)
{
struct vhost_virtqueue *vq = &net->dev.vqs[VHOST_NET_VQ_TX];
- unsigned head, out, in, s;
+ unsigned out, in, s;
+ int head;
struct msghdr msg = {
.msg_name = NULL,
.msg_namelen = 0,
@@ -135,6 +136,9 @@ static void handle_tx(struct vhost_net *net)
ARRAY_SIZE(vq->iov),
&out, &in,
NULL, NULL);
+ /* On error, stop handling until the next kick. */
+ if (unlikely(head < 0))
+ break;
/* Nothing new? Wait for eventfd to tell us they refilled. */
if (head == vq->num) {
wmem = atomic_read(&sock->sk->sk_wmem_alloc);
@@ -192,7 +196,8 @@ static void handle_tx(struct vhost_net *net)
static void handle_rx(struct vhost_net *net)
{
struct vhost_virtqueue *vq = &net->dev.vqs[VHOST_NET_VQ_RX];
- unsigned head, out, in, log, s;
+ unsigned out, in, log, s;
+ int head;
struct vhost_log *vq_log;
struct msghdr msg = {
.msg_name = NULL,
@@ -228,6 +233,9 @@ static void handle_rx(struct vhost_net *net)
ARRAY_SIZE(vq->iov),
&out, &in,
vq_log, &log);
+ /* On error, stop handling until the next kick. */
+ if (unlikely(head < 0))
+ break;
/* OK, now we need to know about added descriptors. */
if (head == vq->num) {
if (unlikely(vhost_enable_notify(vq))) {