[PATCH] gpio: x-gene: fix devm_ioremap_resource() check

[Vladimir Zapolskiy <vz@xxxxxxxxx>]

devm_ioremap_resource() returns IOMEM_ERR_PTR() and it never
returns NULL, fix the check to prevent access to invalid
virtual address.

Signed-off-by: Vladimir Zapolskiy <vz@xxxxxxxxx>
---
 drivers/gpio/gpio-xgene-sb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-xgene-sb.c b/drivers/gpio/gpio-xgene-sb.c
index b6a15c3..fb9d29a 100644
--- a/drivers/gpio/gpio-xgene-sb.c
+++ b/drivers/gpio/gpio-xgene-sb.c
@@ -93,7 +93,7 @@ static int xgene_gpio_sb_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	regs = devm_ioremap_resource(&pdev->dev, res);
-	if (!regs)
+	if (IS_ERR(regs))
 		return PTR_ERR(regs);
 
 	ret = bgpio_init(&priv->bgc, &pdev->dev, 4,
-- 
1.7.10.4

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