thermal/drivers/broadcom: Fix potential NULL dereference in sr_thermal_probe

stable inclusion
from stable-v5.10.121
commit 79098339ac2065f4b4352ef5921628970b6f47e6
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=79098339ac2065f4b4352ef5921628970b6f47e6

--------------------------------

[ Upstream commit e20d136e ]

platform_get_resource() may return NULL, add proper check to
avoid potential NULL dereferencing.

Fixes: 250e2110 ("thermal: broadcom: Add Stingray thermal driver")
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20220425092929.90412-1-zhengyongjun3@huawei.comSigned-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/thermal/broadcom/sr-thermal.c

@@ -60,6 +60,9 @@ static int sr_thermal_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENOENT;
+
 	sr_thermal->regs = (void __iomem *)devm_memremap(&pdev->dev, res->start,
 							 resource_size(res),
 							 MEMREMAP_WB);