linux-kernel - [PATCH] rtc: stm32: add missed clk_disable

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Message-Id: <20191205160655.32188-1-hslester96@gmail.com>
Date:   Fri,  6 Dec 2019 00:06:55 +0800
From:   Chuhong Yuan <hslester96@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        linux-rtc@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Chuhong Yuan <hslester96@...il.com>
Subject: [PATCH] rtc: stm32: add missed clk_disable_unprepare in error path of resume

The resume() forgets to call clk_disable_unprepare() when failed.
Add the missed call to fix it.

Signed-off-by: Chuhong Yuan <hslester96@...il.com>
---
 drivers/rtc/rtc-stm32.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-stm32.c b/drivers/rtc/rtc-stm32.c
index 781cabb2afca..d774aa18f57a 100644
--- a/drivers/rtc/rtc-stm32.c
+++ b/drivers/rtc/rtc-stm32.c
@@ -897,8 +897,11 @@ static int stm32_rtc_resume(struct device *dev)
 	}
 
 	ret = stm32_rtc_wait_sync(rtc);
-	if (ret < 0)
+	if (ret < 0) {
+		if (rtc->data->has_pclk)
+			clk_disable_unprepare(rtc->pclk);
 		return ret;
+	}
 
 	if (device_may_wakeup(dev))
 		return disable_irq_wake(rtc->irq_alarm);
-- 
2.24.0