[PATCH -next] irqchip/irq-rda-intc: Fix return value check in rda8810_intc_init()

[YueHaibing]

In case of error, the function of_io_request_and_map() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: d852e62ad689 ("irqchip: Add RDA8810PL interrupt driver")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/irqchip/irq-rda-intc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-rda-intc.c b/drivers/irqchip/irq-rda-intc.c
index 1176291..f80c424 100644
--- a/drivers/irqchip/irq-rda-intc.c
+++ b/drivers/irqchip/irq-rda-intc.c
@@ -85,7 +85,7 @@ static int __init rda8810_intc_init(struct device_node *node,
 				    struct device_node *parent)
 {
 	rda_intc_base = of_io_request_and_map(node, 0, "rda-intc");
-	if (!rda_intc_base)
+	if (IS_ERR(rda_intc_base))
 		return -ENXIO;
 
 	/* Mask all interrupt sources */
-- 
2.7.0