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virtio: bugfixes

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This includes a bugfix for virtio 9p fs.
 It also fixes hybernation for s390 guests with virtio devices.
 
 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 virtio fixes from Michael Tsirkin:
 "This includes a bugfix for virtio 9p fs. It also fixes hybernation for
  s390 guests with virtio devices"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio/s390: implement PM operations for virtio_ccw
  9p/trans_virtio: discard zero-length reply
This commit is contained in:
Linus Torvalds 2018-02-15 14:29:27 -08:00
commit 2439f9766d
2 changed files with 31 additions and 1 deletions
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29
drivers/s390/virtio/virtio_ccw.c
View File

@ -1297,6 +1297,9 @@ static int virtio_ccw_cio_notify(struct ccw_device *cdev, int event)
vcdev->device_lost = true;
rc = NOTIFY_DONE;
break;
case CIO_OPER:
rc = NOTIFY_OK;
break;
default:
rc = NOTIFY_DONE;
break;
@ -1309,6 +1312,27 @@ static struct ccw_device_id virtio_ids[] = {
{},
};
#ifdef CONFIG_PM_SLEEP
static int virtio_ccw_freeze(struct ccw_device *cdev)
{
struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev);
return virtio_device_freeze(&vcdev->vdev);
}
static int virtio_ccw_restore(struct ccw_device *cdev)
{
struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev);
int ret;
ret = virtio_ccw_set_transport_rev(vcdev);
if (ret)
return ret;
return virtio_device_restore(&vcdev->vdev);
}
#endif
static struct ccw_driver virtio_ccw_driver = {
.driver = {
.owner = THIS_MODULE,
@ -1321,6 +1345,11 @@ static struct ccw_driver virtio_ccw_driver = {
.set_online = virtio_ccw_online,
.notify = virtio_ccw_cio_notify,
.int_class = IRQIO_VIR,
#ifdef CONFIG_PM_SLEEP
.freeze = virtio_ccw_freeze,
.thaw = virtio_ccw_restore,
.restore = virtio_ccw_restore,
#endif
};
static int __init pure_hex(char **cp, unsigned int *val, int min_digit,

3
net/9p/trans_virtio.c
View File

@ -160,7 +160,8 @@ static void req_done(struct virtqueue *vq)
spin_unlock_irqrestore(&chan->lock, flags);
/* Wakeup if anyone waiting for VirtIO ring space. */
wake_up(chan->vc_wq);
p9_client_cb(chan->client, req, REQ_STATUS_RCVD);
if (len)
p9_client_cb(chan->client, req, REQ_STATUS_RCVD);
}
}