[PATCH] media: xilinx: Use dma_request_chan() instead dma_request_slave_channel()

Laurent Pinchart laurent.pinchart at ideasonboard.com
Thu Jan 9 08:48:47 PST 2020


Hi Peter,

Thank you for the patch.

On Tue, Dec 17, 2019 at 12:42:35PM +0200, Peter Ujfalusi wrote:
> dma_request_slave_channel() is a wrapper on top of dma_request_chan()
> eating up the error code.
> 
> By using dma_request_chan() directly the driver can support deferred
> probing against DMA.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

Vinod, could you please pick this up ?

> ---
>  drivers/media/platform/xilinx/xilinx-dma.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c
> index b211380a11f2..9ce515ff9c0a 100644
> --- a/drivers/media/platform/xilinx/xilinx-dma.c
> +++ b/drivers/media/platform/xilinx/xilinx-dma.c
> @@ -725,10 +725,10 @@ int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma,
>  
>  	/* ... and the DMA channel. */
>  	snprintf(name, sizeof(name), "port%u", port);
> -	dma->dma = dma_request_slave_channel(dma->xdev->dev, name);
> -	if (dma->dma == NULL) {
> +	dma->dma = dma_request_chan(dma->xdev->dev, name);
> +	if (IS_ERR(dma->dma)) {
>  		dev_err(dma->xdev->dev, "no VDMA channel found\n");
> -		ret = -ENODEV;
> +		ret = PTR_ERR(dma->dma);
>  		goto error;
>  	}
>  

-- 
Regards,

Laurent Pinchart



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