Xuan Zhuo
2023-Oct-20 09:28 UTC
[PATCH] virtio_ring: add an error code check in virtqueue_resize
If any error happens, this function should restore to the old status. So, whether the err is true, we should goto the virtqueue_enable_after_reset(). If the err is true, that mean the resize new quuee failed, but the queue status has restored to the old status. We should ignore the return value of the virtuqueue_resize_xxx(). Do you find other error in the virtuqueue_resize_xxx(). Thanks. On Fri, 20 Oct 2023 17:23:21 +0800, Su Hui <suhui at nfschina.com> wrote:> virtqueue_resize_packed() or virtqueue_resize_split() can return > error code if failed, so add a check for this. > > Signed-off-by: Su Hui <suhui at nfschina.com> > --- > > I'm not sure that return directly is right or not, > maybe there are some process should do before return. > > drivers/virtio/virtio_ring.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > index 51d8f3299c10..cf662c3a755b 100644 > --- a/drivers/virtio/virtio_ring.c > +++ b/drivers/virtio/virtio_ring.c > @@ -2759,6 +2759,9 @@ int virtqueue_resize(struct virtqueue *_vq, u32 num, > else > err = virtqueue_resize_split(_vq, num); > > + if (err) > + return err; > + > return virtqueue_enable_after_reset(_vq); > } > EXPORT_SYMBOL_GPL(virtqueue_resize); > -- > 2.30.2 >