[Intel-gfx] [PATCH] drm/i915: Fix wakeref cookie handling in debugfs/i915_forcewake_user

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

To avoid a false positive of a leaked wakeref, we can store the cookie
in file->private_data and use it in intel_runtime_pm_put.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 64d805d9ae59..487b6eeba031 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4408,7 +4408,7 @@ static int i915_forcewake_open(struct inode *inode, struct file *file)
 	if (INTEL_GEN(i915) < 6)
 		return 0;
 
-	intel_runtime_pm_get(i915);
+	file->private_data = (void *)(uintptr_t)intel_runtime_pm_get(i915);
 	intel_uncore_forcewake_user_get(i915);
 
 	return 0;
@@ -4422,7 +4422,8 @@ static int i915_forcewake_release(struct inode *inode, struct file *file)
 		return 0;
 
 	intel_uncore_forcewake_user_put(i915);
-	intel_runtime_pm_put_unchecked(i915);
+	intel_runtime_pm_put(i915,
+			     (intel_wakeref_t)(uintptr_t)file->private_data);
 
 	return 0;
 }
-- 
2.19.1