queue/drm-exynos-fix-ref-count-leak-in-mic_pre_enable.patch

From d4f5a095daf0d25f0b385e1ef26338608433a4c5 Mon Sep 17 00:00:00 2001
From: Navid Emamdoost <navid.emamdoost@gmail.com>
Date: Mon, 15 Jun 2020 00:49:28 -0500
Subject: [PATCH] drm/exynos: fix ref count leak in mic_pre_enable

commit d4f5a095daf0d25f0b385e1ef26338608433a4c5 upstream.

in mic_pre_enable, pm_runtime_get_sync is called which
increments the counter even in case of failure, leading to incorrect
ref count. In case of failure, decrement the ref count before returning.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c b/drivers/gpu/drm/exynos/exynos_drm_mic.c
index a86abc173605..3821ea76a703 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
@@ -269,8 +269,10 @@ static void mic_pre_enable(struct drm_bridge *bridge)
 		goto unlock;
 
 	ret = pm_runtime_get_sync(mic->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_noidle(mic->dev);
 		goto unlock;
+	}
 
 	mic_set_path(mic, 1);
 
-- 
2.27.0