linux-kernel - [PATCH 6.7 395/713] drm/tegra: rgb: Fix missing clk_put() in the error handling paths of tegra_dc_rgb

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Date: Sun, 24 Mar 2024 18:42:01 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Thierry Reding <treding@...dia.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.7 395/713] drm/tegra: rgb: Fix missing clk_put() in the error handling paths of tegra_dc_rgb_probe()

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit 45c8034db47842b25a3ab6139d71e13b4e67b9b3 ]

If clk_get_sys(..., "pll_d2_out0") fails, the clk_get_sys() call must be
undone.

Add the missing clk_put and a new 'put_pll_d_out0' label in the error
handling path, and use it.

Fixes: 0c921b6d4ba0 ("drm/tegra: dc: rgb: Allow changing PLLD rate on Tegra30+")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Thierry Reding <treding@...dia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/0182895ead4e4730426616b0d9995954c960b634.1693667005.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/tegra/rgb.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c
index 53c492b13d129..1e8ec50b759e4 100644
--- a/drivers/gpu/drm/tegra/rgb.c
+++ b/drivers/gpu/drm/tegra/rgb.c
@@ -254,7 +254,7 @@ int tegra_dc_rgb_probe(struct tegra_dc *dc)
 		if (IS_ERR(rgb->pll_d2_out0)) {
 			err = PTR_ERR(rgb->pll_d2_out0);
 			dev_err(dc->dev, "failed to get pll_d2_out0: %d\n", err);
-			goto remove;
+			goto put_pll;
 		}
 	}
 
@@ -262,6 +262,8 @@ int tegra_dc_rgb_probe(struct tegra_dc *dc)
 
 	return 0;
 
+put_pll:
+	clk_put(rgb->pll_d_out0);
 remove:
 	tegra_output_remove(&rgb->output);
 	return err;
-- 
2.43.0