diff options
| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2017-10-16 16:29:28 +0300 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2017-10-17 15:28:31 +0300 |
| commit | 080de2e5be2d4b396b6792cde4cb2048fcdb4ce9 (patch) | |
| tree | 941f873199f2a1ba73f91d8edbbdcf8ff15a8960 /drivers/gpu/drm/drm_atomic_helper.c | |
| parent | 4edd60847287c34222116af58f76be985ebddef7 (diff) | |
| download | linux-080de2e5be2d4b396b6792cde4cb2048fcdb4ce9.tar.xz | |
drm/atomic: Check for busy planes/connectors before setting the commit
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.lankhorst@linux.intel.com>
Fixes: 21a01abbe32a ("drm/atomic: Fix freeing connector/plane state too early by tracking commits, v3.")
Link: https://patchwork.freedesktop.org/patch/msgid/20171016132928.6498-2-maarten.lankhorst@linux.intel.com
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/drm_atomic_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index aec73f4c70c6..3472d9ae8b95 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1772,16 +1772,16 @@ 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; @@ -1790,17 +1790,16 @@ 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, new_plane_state->crtc ?: old_plane_state->crtc); if (!commit) return -ENOMEM; |