linux-kernel - [PATCH AUTOSEL for 4.15 045/124] irqchip/ompic: fix return value check in ompic_of

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Message-ID: <20180319154645.11350-45-alexander.levin@microsoft.com>
Date:   Mon, 19 Mar 2018 15:47:46 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Wei Yongjun <weiyongjun1@...wei.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.15 045/124] irqchip/ompic: fix return value
 check in ompic_of_init()

From: Wei Yongjun <weiyongjun1@...wei.com>

[ Upstream commit 404e6bea10662f0e142748353169d25378271e49 ]

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

Fixes: 9b54470afd83 ("irqchip: add initial support for ompic")
Acked-by: Stafford Horne <shorne@...il.com>
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/irqchip/irq-ompic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-ompic.c b/drivers/irqchip/irq-ompic.c
index cf6d0c455518..e66ef4373b1e 100644
--- a/drivers/irqchip/irq-ompic.c
+++ b/drivers/irqchip/irq-ompic.c
@@ -171,9 +171,9 @@ static int __init ompic_of_init(struct device_node *node,
 
 	/* Setup the device */
 	ompic_base = ioremap(res.start, resource_size(&res));
-	if (IS_ERR(ompic_base)) {
+	if (!ompic_base) {
 		pr_err("ompic: unable to map registers");
-		return PTR_ERR(ompic_base);
+		return -ENOMEM;
 	}
 
 	irq = irq_of_parse_and_map(node, 0);
-- 
2.14.1