[PATCH -next] irqchip/riscv-aplic: Fix NULL vs IS_ERR() bug

[Yue Haibing]

devm_platform_ioremap_resource() never returns NULL pointer, it will
return ERR_PTR() when it fails, so check it with IS_ERR().

Fixes: 2333df5ae51e ("irqchip: Add RISC-V advanced PLIC driver for direct-mode")
Signed-off-by: Yue Haibing <yuehaibing@xxxxxxxxxx>
---
 drivers/irqchip/irq-riscv-aplic-main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-riscv-aplic-main.c b/drivers/irqchip/irq-riscv-aplic-main.c
index 28dd175b5764..6d93a85f1fc6 100644
--- a/drivers/irqchip/irq-riscv-aplic-main.c
+++ b/drivers/irqchip/irq-riscv-aplic-main.c
@@ -175,9 +175,9 @@ static int aplic_probe(struct platform_device *pdev)
 
 	/* Map the MMIO registers */
 	regs = devm_platform_ioremap_resource(pdev, 0);
-	if (!regs) {
+	if (IS_ERR(regs))
 		dev_err(dev, "failed map MMIO registers\n");
-		return -ENOMEM;
+		return PTR_ERR(regs);
 	}
 
 	/*
-- 
2.34.1