[PATCH] pinctrl: ns2: Fix potential NULL dereference

[Young Xiao]

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.

Signed-off-by: Young Xiao <92siuy...@gmail.com>
---
 drivers/pinctrl/bcm/pinctrl-ns2-mux.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/bcm/pinctrl-ns2-mux.c 
b/drivers/pinctrl/bcm/pinctrl-ns2-mux.c
index 4b5cf0e..2bf6af7 100644
--- a/drivers/pinctrl/bcm/pinctrl-ns2-mux.c
+++ b/drivers/pinctrl/bcm/pinctrl-ns2-mux.c
@@ -1048,6 +1048,8 @@ static int ns2_pinmux_probe(struct platform_device *pdev)
                return PTR_ERR(pinctrl->base0);
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+       if (!res)
+               return -EINVAL;
        pinctrl->base1 = devm_ioremap_nocache(&pdev->dev, res->start,
                                        resource_size(res));
        if (!pinctrl->base1) {
-- 
2.7.4