[PATCH 5.13 420/800] drm/rockchip: cdn-dp-core: add missing clk_disable_unprepare() on error in cdn_dp_grf_write()

From: Greg Kroah-Hartman
Date: Mon Jul 12 2021 - 04:34:22 EST


From: Yang Yingliang <yangyingliang@xxxxxxxxxx>

[ Upstream commit ae41d925c75b53798f289c69ee8d9f7d36432f6d ]

After calling clk_prepare_enable(), clk_disable_unprepare() need
be called when calling regmap_write() failed.

Fixes: 1a0f7ed3abe2 ("drm/rockchip: cdn-dp: add cdn DP support for rk3399")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210519134928.2696617-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/rockchip/cdn-dp-core.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index a4a45daf93f2..6802d9b65f82 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -73,6 +73,7 @@ static int cdn_dp_grf_write(struct cdn_dp_device *dp,
ret = regmap_write(dp->grf, reg, val);
if (ret) {
DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
+ clk_disable_unprepare(dp->grf_clk);
return ret;
}

--
2.30.2