4.9-stable review patch. If anyone has any objections, please let me know.
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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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/rtc/rtc-bq4802.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/rtc/rtc-bq4802.c +++ b/drivers/rtc/rtc-bq4802.c @@ -164,6 +164,10 @@ static int bq4802_probe(struct platform_ } 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 {