linux-kernel - [PATCH v2] media: platform: Use dev_err_probe instead of dev

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Date:   Wed, 26 Jul 2023 19:51:58 +0800
From:   Wang Ming <machel@...o.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michal Simek <michal.simek@....com>,
        linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH v2] media: platform: Use dev_err_probe instead of dev_err

It is possible that dma_request_chan will return EPROBE_DEFER,
which means that dma->xdev->dev is not ready yet. In this case,
dev_err(dma->xdev->dev), there will be no output. This patch
fixes the bug.

Signed-off-by: Wang Ming <machel@...o.com>
---
 drivers/media/platform/xilinx/xilinx-dma.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c
index 80d6f5b072ea..16ad39bef6c6 100644
--- a/drivers/media/platform/xilinx/xilinx-dma.c
+++ b/drivers/media/platform/xilinx/xilinx-dma.c
@@ -708,9 +708,8 @@ int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma,
 	snprintf(name, sizeof(name), "port%u", port);
 	dma->dma = dma_request_chan(dma->xdev->dev, name);
 	if (IS_ERR(dma->dma)) {
-		ret = PTR_ERR(dma->dma);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dma->xdev->dev, "no VDMA channel found\n");
+		ret = dev_err_probe(dma->xdev->dev, PTR_ERR(dma->dma),
+			"no VDMA channel found\n");
 		goto error;
 	}
 
-- 
2.25.1