[PATCH 4.19 166/346] dmaengine: mv_xor_v2: Fix error return code in mv_xor_v2_probe()

Greg Kroah-Hartman
2020-12-28T16:04:51Z

From: Zhihao Cheng <chengzhihao1@huawei.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@huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Link: https://lore.kernel.org/r/20201124010813.1939095-1-chengzhihao1@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.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 8dc0aa4d73ab8..462adf7e4e952 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -777,8 +777,10 @@ 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