Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.9 26/34] rtc: bq4802: add error handling for devm_ioremap | Date | Sat, 15 Sep 2018 01:34:42 +0000 |
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From: Zhouyang Jia <jiazhouyang09@gmail.com>
[ Upstream commit 7874b919866ba91bac253fa219d3d4c82bb944df ]
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> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.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 bd170cb3361c..5747a54cbd42 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 { -- 2.17.1
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