drm/atomic-helper: remove modeset_lock_all from helper_resume

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

v2: Remove unused config local var (gcc).

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170403083304.9083-5-daniel.vetter@ffwll.ch

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 3160d08..0a3d91c 100644 (file)
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2622,14 +2622,22 @@ 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;
 }