From: Zhouyang Jia <jiazhouyang09@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Zhouyang Jia <jiazhouyang09@gmail.com>,
Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] rtc: rtc-bq4802: add error handling for devm_ioremap
Date: Tue, 12 Jun 2018 12:40:03 +0800 [thread overview]
Message-ID: <1528778404-41456-1-git-send-email-jiazhouyang09@gmail.com> (raw)
When devm_ioremap fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling devm_ioremap.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
---
drivers/rtc/rtc-bq4802.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/rtc/rtc-bq4802.c b/drivers/rtc/rtc-bq4802.c
index bd170cb..5747a54 100644
--- a/drivers/rtc/rtc-bq4802.c
+++ b/drivers/rtc/rtc-bq4802.c
@@ -164,6 +164,10 @@ static int bq4802_probe(struct platform_device *pdev)
} else if (p->r->flags & IORESOURCE_MEM) {
p->regs = devm_ioremap(&pdev->dev, p->r->start,
resource_size(p->r));
+ if (!p->regs){
+ err = -ENOMEM;
+ goto out;
+ }
p->read = bq4802_read_mem;
p->write = bq4802_write_mem;
} else {
--
2.7.4
next reply other threads:[~2018-06-12 4:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-12 4:40 Zhouyang Jia [this message]
2018-06-20 10:46 ` Alexandre Belloni
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