linux-kernel - [PATCH 4.4 074/112] memory: fsl-corenet-cf: Fix handling of platform_get

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Message-Id: <20201027134904.055083893@linuxfoundation.org>
Date:   Tue, 27 Oct 2020 14:49:44 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 074/112] memory: fsl-corenet-cf: Fix handling of platform_get_irq() error

From: Krzysztof Kozlowski <krzk@...nel.org>

[ Upstream commit dd85345abca60a8916617e8d75c0f9ce334336dd ]

platform_get_irq() returns -ERRNO on error.  In such case comparison
to 0 would pass the check.

Fixes: 54afbec0d57f ("memory: Freescale CoreNet Coherency Fabric error reporting driver")
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Link: https://lore.kernel.org/r/20200827073315.29351-1-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/memory/fsl-corenet-cf.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/memory/fsl-corenet-cf.c b/drivers/memory/fsl-corenet-cf.c
index 662d050243bec..2fbf8d09af36b 100644
--- a/drivers/memory/fsl-corenet-cf.c
+++ b/drivers/memory/fsl-corenet-cf.c
@@ -215,10 +215,8 @@ static int ccf_probe(struct platform_device *pdev)
 	dev_set_drvdata(&pdev->dev, ccf);
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq) {
-		dev_err(&pdev->dev, "%s: no irq\n", __func__);
-		return -ENXIO;
-	}
+	if (irq < 0)
+		return irq;
 
 	ret = devm_request_irq(&pdev->dev, irq, ccf_irq, 0, pdev->name, ccf);
 	if (ret) {
-- 
2.25.1