sanitize_watermarks() does not properly handle errors returned by
drm_atomic_helper_duplicate_state(). Make failures drop locks before
returning. We also change the lock of connection_mutex to a
drm_modeset_lock_all_ctx() to make sure any EDEADLK's are handled
earlier.
v2: Change call to lock connetion_mutex with a call to
drm_modeset_lock_all_ctx(). This ensures that any lock contention
is handled earlier and drm_atomic_helper_duplicate_state() won't
return EDEADLK.
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
---
Hopefully a fix for the issue that the CI system tripped over.
drivers/gpu/drm/i915/intel_display.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 391cc7f..5fc942a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15307,7 +15307,7 @@ static void sanitize_watermarks(struct drm_device *dev)
*/
drm_modeset_acquire_init(&ctx, 0);
retry:
- ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
+ ret = drm_modeset_lock_all_ctx(dev, &ctx);
if (ret == -EDEADLK) {
drm_modeset_backoff(&ctx);
goto retry;
@@ -15317,7 +15317,7 @@ retry:
state = drm_atomic_helper_duplicate_state(dev, &ctx);
if (WARN_ON(IS_ERR(state)))
- return;
+ goto fail;
ret = intel_atomic_check(dev, state);
if (ret) {
@@ -15345,6 +15345,7 @@ retry:
}
drm_atomic_state_free(state);
+fail:
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
}
--
2.1.4
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