linux-kernel - [PATCH 2/2] dmaengine: xilinx_dma: Report error in case of dma_set_mask_and

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Message-ID: <20220624063539.18657-3-swati.agarwal@xilinx.com>
Date:   Fri, 24 Jun 2022 12:05:39 +0530
From:   Swati Agarwal <swati.agarwal@...inx.com>
To:     <vkoul@...nel.org>, <lars@...afoo.de>, <adrianml@...mnos.upm.es>,
        <libaokun1@...wei.com>, <marex@...x.de>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <swati.agarwal@...inx.com>,
        <harini.katakam@...inx.com>, <radhey.shyam.pandey@...inx.com>,
        <michal.simek@...inx.com>
Subject: [PATCH 2/2] dmaengine: xilinx_dma: Report error in case of dma_set_mask_and_coherent API failure

The driver does not handle the failure case while calling
dma_set_mask_and_coherent API.

In case of failure, capture the return value of API and then report an
error.

Addresses-coverity: Unchecked return value (CHECKED_RETURN)

Signed-off-by: Swati Agarwal <swati.agarwal@...inx.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
---
 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 fbf341e8c36f..194513eca7a2 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -3212,7 +3212,11 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 		xdev->ext_addr = false;
 
 	/* Set the dma mask bits */
-	dma_set_mask_and_coherent(xdev->dev, DMA_BIT_MASK(addr_width));
+	err = dma_set_mask_and_coherent(xdev->dev, DMA_BIT_MASK(addr_width));
+	if (err < 0) {
+		dev_err(xdev->dev, "DMA mask error %d\n", err);
+		goto disable_clks;
+	}
 
 	/* Initialize the DMA engine */
 	xdev->common.dev = &pdev->dev;
-- 
2.17.1