[Intel-gfx] [PATCH 1/1] drm/i915: Fix memleak in runtime wakeref tracking

[Mika Kuoppala]

If we untrack wakerefs, the actual count may reach zero.
However the krealloced owners array is still there and
needs to be taken care of. Free the owners unconditionally
to fix the leak.

Fixes: dbf99c1f8c7e ("drm/i915: Force printing wakeref tacking during pm_cleanup")
Reported-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Cc: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Imre Deak <imre.deak at intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_runtime_pm.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 502c54428570..8d1aebc3e857 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -221,13 +221,11 @@ __untrack_all_wakerefs(struct intel_runtime_pm_debug *debug,
 static void
 dump_and_free_wakeref_tracking(struct intel_runtime_pm_debug *debug)
 {
-	struct drm_printer p;
+	if (debug->count) {
+		struct drm_printer p = drm_debug_printer("i915");
 
-	if (!debug->count)
-		return;
-
-	p = drm_debug_printer("i915");
-	__print_intel_runtime_pm_wakeref(&p, debug);
+		__print_intel_runtime_pm_wakeref(&p, debug);
+	}
 
 	kfree(debug->owners);
 }
-- 
2.17.1