[PATCH] thermal: broadcom: check return value after calling platform_get_resource()

[Yang Yingliang]

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Fixes: 250e211057c7 ("thermal: broadcom: Add Stingray thermal driver")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
 drivers/thermal/broadcom/sr-thermal.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/thermal/broadcom/sr-thermal.c b/drivers/thermal/broadcom/sr-thermal.c
index 475ce2900771..799128deb91c 100644
--- a/drivers/thermal/broadcom/sr-thermal.c
+++ b/drivers/thermal/broadcom/sr-thermal.c
@@ -60,6 +60,8 @@ static int sr_thermal_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
 	sr_thermal->regs = (void __iomem *)devm_memremap(&pdev->dev, res->start,
 							 resource_size(res),
 							 MEMREMAP_WB);
-- 
2.25.1