From: Jason Wang <jasowang@xxxxxxxxxx>
Date: Fri, 15 Feb 2019 15:53:24 +0800
> When fail, translate_desc() returns negative value, otherwise the
> number of iovs. So we should fail when the return value is negative
> instead of a blindly check against zero.
>
> Reported-by: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>
> Fixes: cc5e71075947 ("vhost: log dirty page correctly")
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
Jason, please put the Fixes tag first.
Thank you.
