4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Wei Yongjun <weiyongj...@huawei.com>
[ Upstream commit 9506755633d0b32ef76f67c345000178e9b0dfc4 ]
platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference
a bit later in the code.
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = platform_get_resource(pdev, t, n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
Acked-by: Robert Jarzmik <robert.jarz...@free.fr>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpio/gpio-pxa.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -660,6 +660,8 @@ static int pxa_gpio_probe(struct platfor
pchip->irq0 = irq0;
pchip->irq1 = irq1;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
gpio_reg_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!gpio_reg_base)
