[PATCH -next] irqchip/exiu: Fix return value check in exiu_init()

[Wei Yongjun]

In case of error, the function of_iomap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Fixes: 706cffc1b912 ("irqchip/exiu: Add support for Socionext Synquacer EXIU 
controller")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/irqchip/irq-sni-exiu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-sni-exiu.c b/drivers/irqchip/irq-sni-exiu.c
index 1b6e2f7..1927b2f 100644
--- a/drivers/irqchip/irq-sni-exiu.c
+++ b/drivers/irqchip/irq-sni-exiu.c
@@ -196,8 +196,8 @@ static int __init exiu_init(struct device_node *node,
        }
 
        data->base = of_iomap(node, 0);
-       if (IS_ERR(data->base)) {
-               err = PTR_ERR(data->base);
+       if (!data->base) {
+               err = -ENODEV;
                goto out_free;
        }