linux-kernel - [PATCH 5.4 168/453] dmaengine: mv_xor_v2: Fix error return code in mv_xor_v2

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Message-Id: <20201228124945.280092805@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:46:44 +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, Hulk Robot <hulkci@...wei.com>,
        Zhihao Cheng <chengzhihao1@...wei.com>,
        Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 168/453] dmaengine: mv_xor_v2: Fix error return code in mv_xor_v2_probe()

From: Zhihao Cheng <chengzhihao1@...wei.com>

[ Upstream commit c95e6515a8c065862361f7e0e452978ade7f94ec ]

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>
Link: https://lore.kernel.org/r/20201124010813.1939095-1-chengzhihao1@huawei.com
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 e3850f04f6763..889a94af4c851 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -766,8 +766,10 @@ 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,
-- 
2.27.0