[PATCH 04/15] drm/atomic-helper: remove modeset_lock_all from helper_resume

[Daniel Vetter]

Atomic code rely shouldn't rely on the magic hidden acquire context.

v2: Remove unused config local var (gcc).

Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/drm_atomic_helper.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 8999da789bb0..978dd8f49476 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2623,14 +2623,22 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state);
 int drm_atomic_helper_resume(struct drm_device *dev,
 			     struct drm_atomic_state *state)
 {
-	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_modeset_acquire_ctx ctx;
 	int err;
 
 	drm_mode_config_reset(dev);
 
-	drm_modeset_lock_all(dev);
-	err = drm_atomic_helper_commit_duplicated_state(state, config->acquire_ctx);
-	drm_modeset_unlock_all(dev);
+	drm_modeset_acquire_init(&ctx, 0);
+	while (1) {
+		err = drm_atomic_helper_commit_duplicated_state(state, &ctx);
+		if (err != -EDEADLK)
+			break;
+
+		drm_modeset_backoff(&ctx);
+	}
+
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
 
 	return err;
 }
-- 
2.11.0