Insist to run llist_del_all() until the free_list is found empty, this
may avoid having to schedule more workqueues.

Signed-off-by: Andrea Arcangeli <aarca...@redhat.com>
---
 drivers/gpu/drm/i915/intel_display.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 24f303e..931f0c7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14374,9 +14374,9 @@ static void intel_atomic_helper_free_state(struct 
drm_i915_private *dev_priv)
        struct intel_atomic_state *state, *next;
        struct llist_node *freed;
 
-       freed = llist_del_all(&dev_priv->atomic_helper.free_list);
-       llist_for_each_entry_safe(state, next, freed, freed)
-               drm_atomic_state_put(&state->base);
+       while ((freed = llist_del_all(&dev_priv->atomic_helper.free_list)))
+               llist_for_each_entry_safe(state, next, freed, freed)
+                       drm_atomic_state_put(&state->base);
 }
 
 static void intel_atomic_helper_free_state_worker(struct work_struct *work)

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