linux-kernel - [PATCH 5.15 081/846] drm/rockchip: dsi: Fix unbalanced clock on probe error

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Message-Id: <20220124184103.788290244@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:33:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Brian Norris <briannorris@...omium.org>,
        Chen-Yu Tsai <wenst@...omium.org>,
        "=?UTF-8?q?N=C3=ADcolas=20F . =20R . =20A . =20Prado?=" 
        <nfraprado@...labora.com>, Heiko Stuebner <heiko@...ech.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 081/846] drm/rockchip: dsi: Fix unbalanced clock on probe error

From: Brian Norris <briannorris@...omium.org>

[ Upstream commit 251888398753924059f3bb247a44153a2853137f ]

Our probe() function never enabled this clock, so we shouldn't disable
it if we fail to probe the bridge.

Noted by inspection.

Fixes: 2d4f7bdafd70 ("drm/rockchip: dsi: migrate to use dw-mipi-dsi bridge driver")
Signed-off-by: Brian Norris <briannorris@...omium.org>
Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
Tested-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210928143413.v3.3.Ie8ceefb51ab6065a1151869b6fcda41a467d4d2c@changeid
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index a2262bee5aa47..b7eaffafbccbc 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -1397,14 +1397,10 @@ static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
 		if (ret != -EPROBE_DEFER)
 			DRM_DEV_ERROR(dev,
 				      "Failed to probe dw_mipi_dsi: %d\n", ret);
-		goto err_clkdisable;
+		return ret;
 	}
 
 	return 0;
-
-err_clkdisable:
-	clk_disable_unprepare(dsi->pllref_clk);
-	return ret;
 }
 
 static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
-- 
2.34.1