This commit introduced a new function vhost_net_set_backend_features() which is a wrap of vhost_set_backend_features() with necessary mutex lockings.
Signed-off-by: Zhu Lingshan <[email protected]> --- drivers/vhost/net.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 531a00d703cd..e01da77538c8 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1679,6 +1679,13 @@ static long vhost_net_set_owner(struct vhost_net *n) return r; } +static void vhost_net_set_backend_features(struct vhost_dev *dev, u64 features) +{ + mutex_lock(&dev->mutex); + vhost_set_backend_features(dev, features); + mutex_unlock(&dev->mutex); +} + static long vhost_net_ioctl(struct file *f, unsigned int ioctl, unsigned long arg) { @@ -1715,7 +1722,7 @@ static long vhost_net_ioctl(struct file *f, unsigned int ioctl, return -EFAULT; if (features & ~VHOST_NET_BACKEND_FEATURES) return -EOPNOTSUPP; - vhost_set_backend_features(&n->dev, features); + vhost_net_set_backend_features(&n->dev, features); return 0; case VHOST_RESET_OWNER: return vhost_net_reset_owner(n); -- 2.18.4
