[PATCH xf86-video-ati] Bail early from drm_wait_pending_flip if there's no pending flip

[Alex Deucher]

On Fri, Sep 7, 2018 at 12:25 PM Michel Dänzer <michel at daenzer.net> wrote:
>
> From: Michel Dänzer <michel.daenzer at amd.com>
>
> No need to process any events in that case.
>
> (Ported from amdgpu commit ca5eb9894fff153c0a1df7bdc4a4745713309e27)
>
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  src/radeon_drm_queue.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/src/radeon_drm_queue.c b/src/radeon_drm_queue.c
> index bf1650ea9..ea78e8e2b 100644
> --- a/src/radeon_drm_queue.c
> +++ b/src/radeon_drm_queue.c
> @@ -284,7 +284,8 @@ void radeon_drm_wait_pending_flip(xf86CrtcPtr crtc)
>
>      drmmode_crtc->wait_flip_nesting_level++;
>
> -    while (!xorg_list_is_empty(&radeon_drm_flip_signalled)) {
> +    while (drmmode_crtc->flip_pending &&
> +          !xorg_list_is_empty(&radeon_drm_flip_signalled)) {
>         e = xorg_list_first_entry(&radeon_drm_flip_signalled,
>                                   struct radeon_drm_queue_entry, list);
>         radeon_drm_queue_handle_one(e);
> --
> 2.19.0.rc1
>
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