[Linaro-mm-sig] Re: [PATCH v3] drm/virtio: use uninterruptible resv lock for plane updates

On Sun, May 17, 2026 at 9:44 PM Dmitry Osipenko dmitry.osipenko@collabora.com wrote:

On 5/15/26 11:40, Deepanshu Kartikey wrote:

...

+int virtio_gpu_array_lock_resv_uninterruptible(struct virtio_gpu_object_array *objs) +{

• unsigned int i;
  

• int ret = 0;
  

• if (objs->nents == 1) {
  

•         dma_resv_lock(objs->objs[0]->resv, NULL);
  

• } else {
  

•         ret = drm_gem_lock_reservations(objs->objs, objs->nents,
  

•                                         &objs->ticket);
  

drm_gem_lock_reservations() is interruptible. Given that only one BO needs to be locked for the fix, make it virtio_gpu_lock_one_resv_uninterruptible() and fail with -EINVAL if objs->nents > 1

-- Best regards, Dmitry

I have sent patch v4.

Thanks

Deepanshu