Re: [PATCH v5 21/39] ata: pata_ep93xx: add device tree support

[Andy Shevchenko]

On Wed, Nov 22, 2023 at 11:59:59AM +0300, Nikita Shubin wrote:
> - add OF ID match table
> - drop platform DMA and filters
> - change DMA setup to OF, so we can defer probe

...

> +	drv_data->dma_rx_channel = dma_request_chan(dev, "rx");
> +	if (IS_ERR(drv_data->dma_rx_channel)) {
> +		ret = PTR_ERR(drv_data->dma_rx_channel);
> +		return dev_err_probe(dev, ret, "rx DMA setup failed");
> +	}

PTR_ERR_OR_ZERO() as suggested in another patch?

...

> +	drv_data->dma_tx_channel = dma_request_chan(&pdev->dev, "tx");
> +	if (IS_ERR(drv_data->dma_tx_channel)) {
> +		ret = PTR_ERR(drv_data->dma_tx_channel);
> +		dev_err_probe(dev, ret, "tx DMA setup failed");
> +		goto fail_release_rx;
>  	}

Ditto.

-- 
With Best Regards,
Andy Shevchenko