linux-kernel - [PATCH 4.9 163/218] rtc: wm8350: Handle error for wm8350_register

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Message-Id: <20220418121204.890836467@linuxfoundation.org>
Date:   Mon, 18 Apr 2022 14:13:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 163/218] rtc: wm8350: Handle error for wm8350_register_irq

From: Jiasheng Jiang <jiasheng@...as.ac.cn>

[ Upstream commit 43f0269b6b89c1eec4ef83c48035608f4dcdd886 ]

As the potential failure of the wm8350_register_irq(),
it should be better to check it and return error if fails.
Also, it need not free 'wm_rtc->rtc' since it will be freed
automatically.

Fixes: 077eaf5b40ec ("rtc: rtc-wm8350: add support for WM8350 RTC")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
Acked-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Link: https://lore.kernel.org/r/20220303085030.291793-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/rtc/rtc-wm8350.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-wm8350.c b/drivers/rtc/rtc-wm8350.c
index fa247deb9cf4..b45d7d9b8c06 100644
--- a/drivers/rtc/rtc-wm8350.c
+++ b/drivers/rtc/rtc-wm8350.c
@@ -443,14 +443,21 @@ static int wm8350_rtc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	wm8350_register_irq(wm8350, WM8350_IRQ_RTC_SEC,
+	ret = wm8350_register_irq(wm8350, WM8350_IRQ_RTC_SEC,
 			    wm8350_rtc_update_handler, 0,
 			    "RTC Seconds", wm8350);
+	if (ret)
+		return ret;
+
 	wm8350_mask_irq(wm8350, WM8350_IRQ_RTC_SEC);
 
-	wm8350_register_irq(wm8350, WM8350_IRQ_RTC_ALM,
+	ret = wm8350_register_irq(wm8350, WM8350_IRQ_RTC_ALM,
 			    wm8350_rtc_alarm_handler, 0,
 			    "RTC Alarm", wm8350);
+	if (ret) {
+		wm8350_free_irq(wm8350, WM8350_IRQ_RTC_SEC, wm8350);
+		return ret;
+	}
 
 	return 0;
 }
-- 
2.35.1