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.vet...@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

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