linux-kernel - [PATCH] irqchip/irq-mvebu-sei: Fix a NULL vs IS

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Message-ID: <20181013102246.GD16086@mwanda>
Date:   Sat, 13 Oct 2018 13:22:46 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Jason Cooper <jason@...edaemon.net>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] irqchip/irq-mvebu-sei: Fix a NULL vs IS_ERR() bug in probe

The devm_ioremap_resource() function never returns NULL, it returns
error pointers.

Fixes: 61ce8d8d8a81 ("irqchip/irq-mvebu-sei: Add new driver for Marvell SEI")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/irqchip/irq-mvebu-sei.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-mvebu-sei.c b/drivers/irqchip/irq-mvebu-sei.c
index 566d69a2edbc..add4c9c934c8 100644
--- a/drivers/irqchip/irq-mvebu-sei.c
+++ b/drivers/irqchip/irq-mvebu-sei.c
@@ -384,9 +384,9 @@ static int mvebu_sei_probe(struct platform_device *pdev)
 
 	sei->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	sei->base = devm_ioremap_resource(sei->dev, sei->res);
-	if (!sei->base) {
+	if (IS_ERR(sei->base)) {
 		dev_err(sei->dev, "Failed to remap SEI resource\n");
-		return -ENODEV;
+		return PTR_ERR(sei->base);
 	}
 
 	/* Retrieve the SEI capabilities with the interrupt ranges */
-- 
2.18.0