On Mon, 31 Aug 2015, Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> wrote:
> Commit ec9f932ed41622d120de52a5b525e4d77b9ef17e
> "drm/atomic: Cleanup on error properly in the atomic ioctl."
> cleaned up some error paths, but didn't fix the TEST_ONLY path.
> In the check only case plane->fb shouldn't be updated, and
> the vblank events should be cleared as on failure.
>
> Changes since v1:
> - Fix -EDEADLK handling of vblank events too.
> - Free state last with CHECK_ONLY.
> Changes since v2:
> - Add comment about freeing crtc_state->event with TEST_ONLY.
> (Daniel Stone)
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Reviewed-by: Daniel Stone <daniels@xxxxxxxxxxxxx>
Pushed to our topic/drm-fixes branch, thanks for the patch and review.
BR,
Jani.
> ---
> drivers/gpu/drm/drm_atomic.c | 39 +++++++++++++++++++++++----------------
> 1 file changed, 23 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index e515261d0a7f..940f80bbf192 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -1540,7 +1540,8 @@ retry:
> copied_props++;
> }
>
> - if (obj->type == DRM_MODE_OBJECT_PLANE && count_props) {
> + if (obj->type == DRM_MODE_OBJECT_PLANE && count_props &&
> + !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) {
> plane = obj_to_plane(obj);
> plane_mask |= (1 << drm_plane_index(plane));
> plane->old_fb = plane->fb;
> @@ -1562,10 +1563,11 @@ retry:
> }
>
> if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
> + /*
> + * Unlike commit, check_only does not clean up state.
> + * Below we call drm_atomic_state_free for it.
> + */
> ret = drm_atomic_check_only(state);
> - /* _check_only() does not free state, unlike _commit() */
> - if (!ret)
> - drm_atomic_state_free(state);
> } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
> ret = drm_atomic_async_commit(state);
> } else {
> @@ -1592,25 +1594,30 @@ out:
> plane->old_fb = NULL;
> }
>
> + if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
> + /*
> + * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive,
> + * if they weren't, this code should be called on success
> + * for TEST_ONLY too.
> + */
> +
> + for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + if (!crtc_state->event)
> + continue;
> +
> + destroy_vblank_event(dev, file_priv,
> + crtc_state->event);
> + }
> + }
> +
> if (ret == -EDEADLK) {
> drm_atomic_state_clear(state);
> drm_modeset_backoff(&ctx);
> goto retry;
> }
>
> - if (ret) {
> - if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> - if (!crtc_state->event)
> - continue;
> -
> - destroy_vblank_event(dev, file_priv,
> - crtc_state->event);
> - }
> - }
> -
> + if (ret || arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
> drm_atomic_state_free(state);
> - }
>
> drm_modeset_drop_locks(&ctx);
> drm_modeset_acquire_fini(&ctx);
> --
> 2.1.0
>
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--
Jani Nikula, Intel Open Source Technology Center
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