linux-kernel - [PATCH -next v2] rtc: stmp3xxx: Add failure handling for stmp3xxx_wdt

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Date:   Thu, 15 Sep 2022 09:33:04 +0800
From:   Lin Yujun <linyujun809@...wei.com>
To:     <a.zummo@...ertech.it>, <alexandre.belloni@...tlin.com>,
        <mcoquelin.stm32@...il.com>, <alexandre.torgue@...s.st.com>,
        <akpm@...ux-foundation.org>, <wsa@...nel.org>, <wim@...ana.be>
CC:     <linux-rtc@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH -next v2] rtc: stmp3xxx: Add failure handling for stmp3xxx_wdt_register()

Use platform_device_put() to free platform device before print
error message when platform_device_add() fails to run. Add dev_err()
to report error in case of alloc memory to wdt_pdev fail.

Fixes: 1a71fb84fda6 ("rtc: stmp3xxx: add wdt-accessor function")
Signed-off-by: Lin Yujun <linyujun809@...wei.com>
---
 drivers/rtc/rtc-stmp3xxx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 40c0f7ed36e0..aae40d20d086 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -107,6 +107,8 @@ static void stmp3xxx_wdt_register(struct platform_device *rtc_pdev)
 		wdt_pdev->dev.parent = &rtc_pdev->dev;
 		wdt_pdev->dev.platform_data = &wdt_pdata;
 		rc = platform_device_add(wdt_pdev);
+		if (rc)
+			platform_device_put(wdt_pdev);
 	}
 
 	if (rc)
-- 
2.17.1