linux-kernel - [PATCH] dmaengine: mv_xor_v2: Fix error return code in mv_xor_v2

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Date:   Tue, 24 Nov 2020 09:08:13 +0800
From:   Zhihao Cheng <chengzhihao1@...wei.com>
To:     <vkoul@...nel.org>, <thomas.petazzoni@...e-electrons.com>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <chengzhihao1@...wei.com>, <yi.zhang@...wei.com>
Subject: [PATCH] dmaengine: mv_xor_v2: Fix error return code in mv_xor_v2_probe()

Return the corresponding error code when first_msi_entry() returns
NULL in mv_xor_v2_probe().

Fixes: 19a340b1a820430 ("dmaengine: mv_xor_v2: new driver")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
---
 drivers/dma/mv_xor_v2.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index 2753a6b916f6..9b0d463f89bb 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -771,8 +771,10 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
 		goto disable_clk;
 
 	msi_desc = first_msi_entry(&pdev->dev);
-	if (!msi_desc)
+	if (!msi_desc) {
+		ret = -ENODEV;
 		goto free_msi_irqs;
+	}
 	xor_dev->msi_desc = msi_desc;
 
 	ret = devm_request_irq(&pdev->dev, msi_desc->irq,
-- 
2.25.4