From 41d7b8291c6d753b49dfeba45b0c4a8ffaff874e Mon Sep 17 00:00:00 2001
From: Zhang Zekun <zhangzekun11@huawei.com>
Date: Tue, 2 Aug 2022 08:50:50 +0000
Subject: [PATCH] drm/tegra: Add missing clk_disable_unprepare() in
 tegra_dc_probe()

[ Upstream commit 7ad4384d53c67672a8720cdc2ef638d7d1710ab8 ]

Add the missing clk_disable_unprepare() before return from
tegra_dc_probe() in the error handling path.

Fixes: f68ba6912bd2 ("drm/tegra: dc: Link DC1 to DC0 on Tegra20")
Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/tegra/dc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index a29d64f875635..abb409b08bc64 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -3022,8 +3022,10 @@ static int tegra_dc_probe(struct platform_device *pdev)
 	usleep_range(2000, 4000);
 
 	err = reset_control_assert(dc->rst);
-	if (err < 0)
+	if (err < 0) {
+		clk_disable_unprepare(dc->clk);
 		return err;
+	}
 
 	usleep_range(2000, 4000);