diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-11-19 20:38:07 +0300 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2014-11-20 04:35:19 +0300 |
| commit | 6f75cea66c8dd043ced282016b21a639af176642 (patch) | |
| tree | 97174a86fc4aab950c0318e481a42ccd5ebfe91a /drivers/gpu/drm | |
| parent | c7eb76f4931b505e57c6510133df19f4ec1ce3e5 (diff) | |
| download | linux-6f75cea66c8dd043ced282016b21a639af176642.tar.xz | |
drm/atomic: Only destroy connector states with connection mutex held
Otherwise the connector might have been unplugged and destroyed while
we didn't look. Yet another fallout from DP MST hotplugging that I
didn't consider.
To make sure we get this right add an appropriate WARN_ON to
drm_atomic_state_clear (obviously only when we actually have a state
to clear up). And reorder all the state_clear and backoff calls to
make it work out properly.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 14 |
2 files changed, 13 insertions, 10 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 90b2d1644bd7..67c1dc894bd9 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -112,21 +112,24 @@ EXPORT_SYMBOL(drm_atomic_state_alloc); void drm_atomic_state_clear(struct drm_atomic_state *state) { struct drm_device *dev = state->dev; + struct drm_mode_config *config = &dev->mode_config; int i; DRM_DEBUG_KMS("Clearing atomic state %p\n", state); - for (i = 0; i < dev->mode_config.num_connector; i++) { + for (i = 0; i < config->num_connector; i++) { struct drm_connector *connector = state->connectors[i]; if (!connector) continue; + WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); + connector->funcs->atomic_destroy_state(connector, state->connector_states[i]); } - for (i = 0; i < dev->mode_config.num_crtc; i++) { + for (i = 0; i < config->num_crtc; i++) { struct drm_crtc *crtc = state->crtcs[i]; if (!crtc) @@ -136,7 +139,7 @@ void drm_atomic_state_clear(struct drm_atomic_state *state) state->crtc_states[i]); } - for (i = 0; i < dev->mode_config.num_total_plane; i++) { + for (i = 0; i < config->num_total_plane; i++) { struct drm_plane *plane = state->planes[i]; if (!plane) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index fad2b932cf72..0cd054615920 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1217,8 +1217,8 @@ fail: return ret; backoff: - drm_atomic_legacy_backoff(state); drm_atomic_state_clear(state); + drm_atomic_legacy_backoff(state); /* * Someone might have exchanged the framebuffer while we dropped locks @@ -1285,8 +1285,8 @@ fail: return ret; backoff: - drm_atomic_legacy_backoff(state); drm_atomic_state_clear(state); + drm_atomic_legacy_backoff(state); /* * Someone might have exchanged the framebuffer while we dropped locks @@ -1462,8 +1462,8 @@ fail: return ret; backoff: - drm_atomic_legacy_backoff(state); drm_atomic_state_clear(state); + drm_atomic_legacy_backoff(state); /* * Someone might have exchanged the framebuffer while we dropped locks @@ -1528,8 +1528,8 @@ fail: return ret; backoff: - drm_atomic_legacy_backoff(state); drm_atomic_state_clear(state); + drm_atomic_legacy_backoff(state); goto retry; } @@ -1587,8 +1587,8 @@ fail: return ret; backoff: - drm_atomic_legacy_backoff(state); drm_atomic_state_clear(state); + drm_atomic_legacy_backoff(state); goto retry; } @@ -1646,8 +1646,8 @@ fail: return ret; backoff: - drm_atomic_legacy_backoff(state); drm_atomic_state_clear(state); + drm_atomic_legacy_backoff(state); goto retry; } @@ -1725,8 +1725,8 @@ fail: return ret; backoff: - drm_atomic_legacy_backoff(state); drm_atomic_state_clear(state); + drm_atomic_legacy_backoff(state); /* * Someone might have exchanged the framebuffer while we dropped locks |