linux-kernel - [PATCH v2 1/3] dmaengine: xilinx_dma: check dma_async_device

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Date:   Wed, 23 Dec 2020 16:51:00 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
To:     <vkoul@...nel.org>, <dan.j.williams@...el.com>,
        <michal.simek@...inx.com>, <nick.graumann@...il.com>,
        <andrea.merello@...il.com>, <appana.durga.rao@...inx.com>,
        <mcgrof@...nel.org>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <git@...inx.com>, Shravya Kumbham <shravya.kumbham@...inx.com>,
        "Radhey Shyam Pandey" <radhey.shyam.pandey@...inx.com>
Subject: [PATCH v2 1/3] dmaengine: xilinx_dma: check dma_async_device_register return value

From: Shravya Kumbham <shravya.kumbham@...inx.com>

dma_async_device_register() can return non-zero error code. Add
condition to check the return value of dma_async_device_register
function and handle the error path.

Addresses-Coverity: Event check_return.
Fixes: 9cd4360de609 ("dma: Add Xilinx AXI Video Direct Memory Access Engine driver support")
Signed-off-by: Shravya Kumbham <shravya.kumbham@...inx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
---
Changes for v2:
- Include fixes tag.
---
 drivers/dma/xilinx/xilinx_dma.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 993297d585c0..e41435be5b79 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -3133,7 +3133,11 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 	}
 
 	/* Register the DMA engine with the core */
-	dma_async_device_register(&xdev->common);
+	err = dma_async_device_register(&xdev->common);
+	if (err) {
+		dev_err(xdev->dev, "failed to register the dma device\n");
+		goto error;
+	}
 
 	err = of_dma_controller_register(node, of_dma_xilinx_xlate,
 					 xdev);
-- 
2.7.4