linux-kernel - [PATCH] dmaengine: axi-dmac: Add check for dma_set_max_seg

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Date: Sun, 23 Jun 2024 16:16:44 +0800
From: Ma Ke <make24@...as.ac.cn>
To: lars@...afoo.de,
	vkoul@...nel.org
Cc: dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ma Ke <make24@...as.ac.cn>
Subject: [PATCH] dmaengine: axi-dmac: Add check for dma_set_max_seg_size

To avoid possible failure of the dma_set_max_seg_size(), we should
better check the return value of the dma_set_max_seg_size().

Signed-off-by: Ma Ke <make24@...as.ac.cn>
---
 drivers/dma/dma-axi-dmac.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index bdb752f11869..93543c2f1bd7 100644
--- a/drivers/dma/dma-axi-dmac.c
+++ b/drivers/dma/dma-axi-dmac.c
@@ -1051,7 +1051,9 @@ static int axi_dmac_probe(struct platform_device *pdev)
 
 	INIT_LIST_HEAD(&dmac->chan.active_descs);
 
-	dma_set_max_seg_size(&pdev->dev, UINT_MAX);
+	ret = dma_set_max_seg_size(&pdev->dev, UINT_MAX);
+	if (ret)
+		return ret;
 
 	dma_dev = &dmac->dma_dev;
 	dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
-- 
2.25.1