linux-kernel - [PATCH 5.4 299/453] pwm: zx: Add missing cleanup in error path

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Date:   Mon, 28 Dec 2020 13:48:55 +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,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Shawn Guo <shawn.guo@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 299/453] pwm: zx: Add missing cleanup in error path

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

[ Upstream commit 269effd03f6142df4c74814cfdd5f0b041b30bf9 ]

zx_pwm_probe() called clk_prepare_enable() before; this must be undone
in the error path.

Fixes: 4836193c435c ("pwm: Add ZTE ZX PWM device driver")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Acked-by: Shawn Guo <shawn.guo@...aro.org>
Signed-off-by: Thierry Reding <thierry.reding@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pwm/pwm-zx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pwm/pwm-zx.c b/drivers/pwm/pwm-zx.c
index e2c21cc34a96a..3763ce5311ac2 100644
--- a/drivers/pwm/pwm-zx.c
+++ b/drivers/pwm/pwm-zx.c
@@ -238,6 +238,7 @@ static int zx_pwm_probe(struct platform_device *pdev)
 	ret = pwmchip_add(&zpc->chip);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
+		clk_disable_unprepare(zpc->pclk);
 		return ret;
 	}
 
-- 
2.27.0