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

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

Fixes: 250e211057c72 ("thermal: broadcom: Add Stingray thermal driver")
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20220425092929.90412-1-zhengyongjun3@huawei.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

diff --git a/drivers/thermal/broadcom/sr-thermal.c b/drivers/thermal/broadcom/sr-thermal.c
index 475ce29..85ab9ed 100644 (file)
--- a/drivers/thermal/broadcom/sr-thermal.c
+++ b/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);