[PATCH v2] drm/exynos: fix ref count leak in mic_pre_enable

[Navid Emamdoost]

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.emamdo...@gmail.com>
---
Changes in v2:
        - reuse the unlock label and call pm_runtime_put_noidle
---
---
 drivers/gpu/drm/exynos/exynos_drm_mic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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);
 
-- 
2.17.1