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One cc: stable commit, the rest are a series of minor cleanups which have

Browse source 
been sitting in MST's tree during my vacation.  I changed a function name
 and made one trivial change, then they spent two days in linux-next.
 
 Thanks,
 Rusty.
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Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull virtio updates from Rusty Russell:
 "One cc: stable commit, the rest are a series of minor cleanups which
  have been sitting in MST's tree during my vacation.  I changed a
  function name and made one trivial change, then they spent two days in
  linux-next"

* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (25 commits)
  virtio-rng: refactor probe error handling
  virtio_scsi: drop scan callback
  virtio_balloon: enable VQs early on restore
  virtio_scsi: fix race on device removal
  virito_scsi: use freezable WQ for events
  virtio_net: enable VQs early on restore
  virtio_console: enable VQs early on restore
  virtio_scsi: enable VQs early on restore
  virtio_blk: enable VQs early on restore
  virtio_scsi: move kick event out from virtscsi_init
  virtio_net: fix use after free on allocation failure
  9p/trans_virtio: enable VQs early
  virtio_console: enable VQs early
  virtio_blk: enable VQs early
  virtio_net: enable VQs early
  virtio: add API to enable VQs early
  virtio_net: minor cleanup
  virtio-net: drop config_mutex
  virtio_net: drop config_enable
  virtio-blk: drop config_mutex
  ...
This commit is contained in:
Linus Torvalds 2014-10-18 10:25:09 -07:00
commit 0e6e58f941
15 changed files with 207 additions and 137 deletions
Download patch file Download diff file Expand all files Collapse all files

44
drivers/net/virtio_net.c
View file

@ -123,9 +123,6 @@ struct virtnet_info {
/* Host can handle any s/g split between our header and packet data */
bool any_header_sg;
/* enable config space updates */
bool config_enable;
/* Active statistics */
struct virtnet_stats __percpu *stats;
@ -135,9 +132,6 @@ struct virtnet_info {
/* Work struct for config space updates */
struct work_struct config_work;
/* Lock for config space updates */
struct mutex config_lock;
/* Does the affinity hint is set for virtqueues? */
bool affinity_hint_set;
@ -1414,13 +1408,9 @@ static void virtnet_config_changed_work(struct work_struct *work)
container_of(work, struct virtnet_info, config_work);
u16 v;
mutex_lock(&vi->config_lock);
if (!vi->config_enable)
goto done;
if (virtio_cread_feature(vi->vdev, VIRTIO_NET_F_STATUS,
struct virtio_net_config, status, &v) < 0)
goto done;
return;
if (v & VIRTIO_NET_S_ANNOUNCE) {
netdev_notify_peers(vi->dev);
@ -1431,7 +1421,7 @@ static void virtnet_config_changed_work(struct work_struct *work)
v &= VIRTIO_NET_S_LINK_UP;
if (vi->status == v)
goto done;
return;
vi->status = v;
@ -1442,8 +1432,6 @@ static void virtnet_config_changed_work(struct work_struct *work)
netif_carrier_off(vi->dev);
netif_tx_stop_all_queues(vi->dev);
}
done:
mutex_unlock(&vi->config_lock);
}
static void virtnet_config_changed(struct virtio_device *vdev)
@ -1764,8 +1752,6 @@ static int virtnet_probe(struct virtio_device *vdev)
u64_stats_init(&virtnet_stats->rx_syncp);
}
mutex_init(&vi->config_lock);
vi->config_enable = true;
INIT_WORK(&vi->config_work, virtnet_config_changed_work);
/* If we can receive ANY GSO packets, we must allocate large ones. */
@ -1813,6 +1799,8 @@ static int virtnet_probe(struct virtio_device *vdev)
goto free_vqs;
}
virtio_device_ready(vdev);
/* Last of all, set up some receive buffers. */
for (i = 0; i < vi->curr_queue_pairs; i++) {
try_fill_recv(&vi->rq[i], GFP_KERNEL);
@ -1849,6 +1837,8 @@ static int virtnet_probe(struct virtio_device *vdev)
return 0;
free_recv_bufs:
vi->vdev->config->reset(vdev);
free_receive_bufs(vi);
unregister_netdev(dev);
free_vqs:
@ -1882,17 +1872,13 @@ static void virtnet_remove(struct virtio_device *vdev)
unregister_hotcpu_notifier(&vi->nb);
/* Prevent config work handler from accessing the device. */
mutex_lock(&vi->config_lock);
vi->config_enable = false;
mutex_unlock(&vi->config_lock);
/* Make sure no work handler is accessing the device. */
flush_work(&vi->config_work);
unregister_netdev(vi->dev);
remove_vq_common(vi);
flush_work(&vi->config_work);
free_percpu(vi->stats);
free_netdev(vi->dev);
}
@ -1905,10 +1891,8 @@ static int virtnet_freeze(struct virtio_device *vdev)
unregister_hotcpu_notifier(&vi->nb);
/* Prevent config work handler from accessing the device */
mutex_lock(&vi->config_lock);
vi->config_enable = false;
mutex_unlock(&vi->config_lock);
/* Make sure no work handler is accessing the device */
flush_work(&vi->config_work);
netif_device_detach(vi->dev);
cancel_delayed_work_sync(&vi->refill);
@ -1923,8 +1907,6 @@ static int virtnet_freeze(struct virtio_device *vdev)
remove_vq_common(vi);
flush_work(&vi->config_work);
return 0;
}
@ -1937,6 +1919,8 @@ static int virtnet_restore(struct virtio_device *vdev)
if (err)
return err;
virtio_device_ready(vdev);
if (netif_running(vi->dev)) {
for (i = 0; i < vi->curr_queue_pairs; i++)
if (!try_fill_recv(&vi->rq[i], GFP_KERNEL))
@ -1948,10 +1932,6 @@ static int virtnet_restore(struct virtio_device *vdev)
netif_device_attach(vi->dev);
mutex_lock(&vi->config_lock);
vi->config_enable = true;
mutex_unlock(&vi->config_lock);
rtnl_lock();
virtnet_set_queues(vi, vi->curr_queue_pairs);
rtnl_unlock();