[PATCH 4.9 167/251] rtc: st-lpc: Add missing clk_disable_unprepare in st_rtc_probe()

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From: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx>

[ Upstream commit 5fb733d7bd6949e90028efdce8bd528c6ab7cf1e ]

The clk_disable_unprepare() should be called in the error handling
of clk_get_rate(), fix it.

Fixes: b5b2bdfc2893 ("rtc: st: Add new driver for ST's LPC RTC")
Signed-off-by: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221123014805.1993052-1-cuigaosheng1@xxxxxxxxxx
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/rtc/rtc-st-lpc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 74c0a336ceea..85756ef63c22 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -249,6 +249,7 @@ static int st_rtc_probe(struct platform_device *pdev)
 
 	rtc->clkrate = clk_get_rate(rtc->clk);
 	if (!rtc->clkrate) {
+		clk_disable_unprepare(rtc->clk);
 		dev_err(&pdev->dev, "Unable to fetch clock rate\n");
 		return -EINVAL;
 	}
-- 
2.35.1






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