linux-kernel - [PATCH] media: coda/imx-vdoa: Handle dma_set_coherent

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Date:   Mon,  6 Dec 2021 10:22:01 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     p.zabel@...gutronix.de, mchehab@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com
Cc:     linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] media: coda/imx-vdoa: Handle dma_set_coherent_mask error codes

The return value of dma_set_coherent_mask() is not always 0.
To catch the exception in case that dma is not support the mask.

Fixes: b0444f18e0b1 ("[media] coda: add i.MX6 VDOA driver")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/media/platform/coda/imx-vdoa.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/coda/imx-vdoa.c b/drivers/media/platform/coda/imx-vdoa.c
index 8bc0d8371819..dd6e2e320264 100644
--- a/drivers/media/platform/coda/imx-vdoa.c
+++ b/drivers/media/platform/coda/imx-vdoa.c
@@ -287,7 +287,11 @@ static int vdoa_probe(struct platform_device *pdev)
 	struct resource *res;
 	int ret;
 
-	dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(&pdev->dev, "DMA enable failed\n");
+		return ret;
+	}
 
 	vdoa = devm_kzalloc(&pdev->dev, sizeof(*vdoa), GFP_KERNEL);
 	if (!vdoa)
-- 
2.25.1