linux-kernel - [PATCH -next] irqchip/exiu: Fix return value check in exiu

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Date:   Tue, 14 Nov 2017 06:57:28 +0000
From:   Wei Yongjun <weiyongjun1@...wei.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
CC:     Wei Yongjun <weiyongjun1@...wei.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] irqchip/exiu: Fix return value check in exiu_init()

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 <weiyongjun1@...wei.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;
 	}