[Intel-gfx] [CI 1/2] drm/i915: Avoid cross-contanimation of intel_wakeref.work lockdep

[Chris Wilson]

Separate out the lockclass for the embedded work for intel_wakeref to
avoid cross-contamination between different wakerefs.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_wakeref.c | 6 ++++--
 drivers/gpu/drm/i915/intel_wakeref.h | 8 +++++---
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_wakeref.c b/drivers/gpu/drm/i915/intel_wakeref.c
index 59aa1b6f1827..aca661cf872f 100644
--- a/drivers/gpu/drm/i915/intel_wakeref.c
+++ b/drivers/gpu/drm/i915/intel_wakeref.c
@@ -95,16 +95,18 @@ static void __intel_wakeref_put_work(struct work_struct *wrk)
 void __intel_wakeref_init(struct intel_wakeref *wf,
 			  struct intel_runtime_pm *rpm,
 			  const struct intel_wakeref_ops *ops,
-			  struct lock_class_key *key)
+			  struct lock_class_key *mkey,
+			  struct lock_class_key *wkey)
 {
 	wf->rpm = rpm;
 	wf->ops = ops;
 
-	__mutex_init(&wf->mutex, "wakeref", key);
+	__mutex_init(&wf->mutex, "wakeref", mkey);
 	atomic_set(&wf->count, 0);
 	wf->wakeref = 0;
 
 	INIT_WORK(&wf->work, __intel_wakeref_put_work);
+	lockdep_init_map(&wf->work.lockdep_map, "wakeref.work", wkey, 0);
 }
 
 int intel_wakeref_wait_for_idle(struct intel_wakeref *wf)
diff --git a/drivers/gpu/drm/i915/intel_wakeref.h b/drivers/gpu/drm/i915/intel_wakeref.h
index 8d945db94b7a..a6baac08cc85 100644
--- a/drivers/gpu/drm/i915/intel_wakeref.h
+++ b/drivers/gpu/drm/i915/intel_wakeref.h
@@ -47,11 +47,13 @@ struct intel_wakeref {
 void __intel_wakeref_init(struct intel_wakeref *wf,
 			  struct intel_runtime_pm *rpm,
 			  const struct intel_wakeref_ops *ops,
-			  struct lock_class_key *key);
+			  struct lock_class_key *mkey,
+			  struct lock_class_key *wkey);
 #define intel_wakeref_init(wf, rpm, ops) do {				\
-	static struct lock_class_key __key;				\
+	static struct lock_class_key __mkey;				\
+	static struct lock_class_key __wkey;				\
 									\
-	__intel_wakeref_init((wf), (rpm), (ops), &__key);		\
+	__intel_wakeref_init((wf), (rpm), (ops), &__mkey, &__wkey);	\
 } while (0)
 
 int __intel_wakeref_get_first(struct intel_wakeref *wf);
-- 
2.24.1