[PATCH] gpio: xgene: Prevent NULL pointer dereference

[Axel Lin <axel.lin@xxxxxxxxxx>]

platform_get_resource() can return NULL, thus add NULL test to prevent NULL
pointer dereference.

Signed-off-by: Axel Lin <axel.lin@xxxxxxxxxx>
---
 drivers/gpio/gpio-xgene.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c
index c0aa387..0dc9161 100644
--- a/drivers/gpio/gpio-xgene.c
+++ b/drivers/gpio/gpio-xgene.c
@@ -173,6 +173,11 @@ static int xgene_gpio_probe(struct platform_device *pdev)
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		err = -EINVAL;
+		goto err;
+	}
+
 	gpio->base = devm_ioremap_nocache(&pdev->dev, res->start,
 							resource_size(res));
 	if (!gpio->base) {
-- 
2.1.4



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