The crtc->commit_lock only protects commit_list and commit_entry. If
we chase the pointer from the drm_atomic_state update structure, then
we don't need any locks (since we hold a reference already).
Simplify the locking accordingly.
Noticed while reviewing a patch from Boris.
Cc: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_atomic_helper.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 86d3093c6c9b..9bf86eb87fe1 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1680,9 +1680,7 @@ void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state)
/* backend must have consumed any event by now */
WARN_ON(new_crtc_state->event);
- spin_lock(&crtc->commit_lock);
complete_all(&commit->hw_done);
- spin_unlock(&crtc->commit_lock);
}
}
EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done);
@@ -1711,7 +1709,6 @@ void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state)
if (WARN_ON(!commit))
continue;
- spin_lock(&crtc->commit_lock);
complete_all(&commit->cleanup_done);
WARN_ON(!try_wait_for_completion(&commit->hw_done));
@@ -1721,8 +1718,6 @@ void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state)
if (try_wait_for_completion(&commit->flip_done))
goto del_commit;
- spin_unlock(&crtc->commit_lock);
-
/* We must wait for the vblank event to signal our completion
* before releasing our reference, since the vblank work does
* not hold a reference of its own. */
@@ -1732,8 +1727,8 @@ void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state)
DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
crtc->base.id, crtc->name);
- spin_lock(&crtc->commit_lock);
del_commit:
+ spin_lock(&crtc->commit_lock);
list_del(&commit->commit_entry);
spin_unlock(&crtc->commit_lock);
}
--
2.11.0
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