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virtio: last minute fixes for 3.4 

Here are a couple of last minute virtio fixes for 3.4.
 Hope it's not too late yes - I might have tried too hard
 to make sure the fix is well tested.
 
 Fixes are by Amit and myself. One fixes module removal
 and one suspend of a VM, the last one the handling of out
 of memory condition.
 They are thus very low risk as most people never hit these paths, but do fix
 very annoying problems for people that do use the feature.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull last minute virtio fixes from Michael S. Tsirkin:
 "Here are a couple of last minute virtio fixes for 3.4.  Hope it's not
  too late yes - I might have tried too hard to make sure the fix is
  well tested.

  Fixes are by Amit and myself.  One fixes module removal and one
  suspend of a VM, the last one the handling of out of memory condition.

  They are thus very low risk as most people never hit these paths, but
  do fix very annoying problems for people that do use the feature.

  Signed-off-by: Michael S. Tsirkin <mst@redhat.com>"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_net: invoke softirqs after __napi_schedule
  virtio: balloon: let host know of updated balloon size before module removal
  virtio: console: tell host of open ports after resume from s3/s4
This commit is contained in:
Linus Torvalds 2012-05-17 09:55:58 -07:00
parent 674ff51776 ec13ee8014
commit 42e8b9c001
3 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/char/virtio_console.c
View File

@ -1895,6 +1895,13 @@ static int virtcons_restore(struct virtio_device *vdev)
/* Get port open/close status on the host */
send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
/*
* If a port was open at the time of suspending, we
* have to let the host know that it's still open.
*/
if (port->guest_connected)
send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1);
}
return 0;
}

2
drivers/net/virtio_net.c
View File

@ -492,7 +492,9 @@ static void virtnet_napi_enable(struct virtnet_info *vi)
* We synchronize against interrupts via NAPI_STATE_SCHED */
if (napi_schedule_prep(&vi->napi)) {
virtqueue_disable_cb(vi->rvq);
local_bh_disable();
__napi_schedule(&vi->napi);
local_bh_enable();
}
}

1
drivers/virtio/virtio_balloon.c
View File

@ -390,6 +390,7 @@ static void __devexit virtballoon_remove(struct virtio_device *vdev)
/* There might be pages left in the balloon: free them. */
while (vb->num_pages)
leak_balloon(vb, vb->num_pages);
update_balloon_size(vb);
/* Now we reset the device so we can clean up the queues. */
vdev->config->reset(vdev);