On Mon, Oct 16, 2017 at 03:29:28PM +0200, Maarten Lankhorst wrote:
> We still want to fail with -EBUSY if a plane or connector is part of
> a commit, even if it will be assigned to a new commit.
>
> This closes a small hole left open where we should return -EBUSY.
> It's not severe, because wait_for_dependencies and swap_state helpers
> still block. But it should return -EBUSY and not stall.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Fixes: 21a01abbe32a ("drm/atomic: Fix freeing connector/plane state too early
> by tracking commits, v3.")
Looks sane to me
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 17 ++++++++---------
> 1 file changed, 8 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c
> b/drivers/gpu/drm/drm_atomic_helper.c
> index b64c8f5bc940..c2a7887deb25 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -1775,16 +1775,16 @@ int drm_atomic_helper_setup_commit(struct
> drm_atomic_state *state,
> }
>
> for_each_oldnew_connector_in_state(state, conn, old_conn_state,
> new_conn_state, i) {
> - /* commit tracked through new_crtc_state->commit, no need to do
> it explicitly */
> - if (new_conn_state->crtc)
> - continue;
> -
> /* Userspace is not allowed to get ahead of the previous
> * commit with nonblocking ones. */
> if (nonblock && old_conn_state->commit &&
>
> !try_wait_for_completion(&old_conn_state->commit->flip_done))
> return -EBUSY;
>
> + /* commit tracked through new_crtc_state->commit, no need to do
> it explicitly */
> + if (new_conn_state->crtc)
> + continue;
> +
> commit = crtc_or_fake_commit(state, old_conn_state->crtc);
> if (!commit)
> return -ENOMEM;
> @@ -1793,17 +1793,16 @@ int drm_atomic_helper_setup_commit(struct
> drm_atomic_state *state,
> }
>
> for_each_oldnew_plane_in_state(state, plane, old_plane_state,
> new_plane_state, i) {
> - /*
> - * Unlike connectors, always track planes explicitly for
> - * async pageflip support.
> - */
> -
> /* Userspace is not allowed to get ahead of the previous
> * commit with nonblocking ones. */
> if (nonblock && old_plane_state->commit &&
>
> !try_wait_for_completion(&old_plane_state->commit->flip_done))
> return -EBUSY;
>
> + /*
> + * Unlike connectors, always track planes explicitly for
> + * async pageflip support.
> + */
> commit = crtc_or_fake_commit(state, old_plane_state->crtc ?:
> new_plane_state->crtc);
> if (!commit)
> return -ENOMEM;
> --
> 2.14.1
>
> _______________________________________________
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> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Ville Syrjälä
Intel OTC
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