Re: [PATCH 5/6] vringh: fix copy direction of vringh_iov_push_kern()

Alex Williamson
2019-09-23T15:45:59Z

On Mon, 23 Sep 2019 21:03:30 +0800
Jason Wang <jasowang@redhat.com> wrote:

> We want to copy from iov to buf, so the direction was wrong.
>
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
> drivers/vhost/vringh.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)

Why is this included in the series? Seems like an unrelated fix being
held up within a proposal for a new feature. Thanks,

Alex

> diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
> index 08ad0d1f0476..a0a2d74967ef 100644
> --- a/drivers/vhost/vringh.c
> +++ b/drivers/vhost/vringh.c
> @@ -852,6 +852,12 @@ static inline int xfer_kern(void *src, void *dst, size_t len)
> return 0;
> }
>
> +static inline int kern_xfer(void *dst, void *src, size_t len)
> +{
> + memcpy(dst, src, len);
> + return 0;
> +}
> +
> /**
> * vringh_init_kern - initialize a vringh for a kernelspace vring.
> * @vrh: the vringh to initialize.
> @@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern);
> ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov,
> const void *src, size_t len)
> {
> - return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern);
> + return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer);
> }
> EXPORT_SYMBOL(vringh_iov_push_kern);
>