On 2020/10/26 上午10:59, Jason Wang wrote:

On 2020/10/23 下午11:34, Michael S. Tsirkin wrote:

quoted

On Fri, Oct 23, 2020 at 03:08:53PM +0300, Dan Carpenter wrote:

quoted

The copy_to/from_user() functions return the number of bytes which we
weren't able to copy but the ioctl should return -EFAULT if they fail.

Fixes: a127c5bbb6a8 ("vhost-vdpa: fix backend feature ioctls")
Signed-off-by: Dan Carpenter <redacted>

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Needed for stable I guess.

Agree.

Acked-by: Jason Wang <jasowang@redhat.com>

Hi Michael.

I don't see this in your tree, please consider to merge.

Thanks