Re: [PATCH 3/3] PCI: keystone: Set DMA mask and coherent DMA mask

[Christoph Hellwig]

On Wed, Nov 10, 2021 at 01:03:43PM +0530, Kishon Vijay Abraham I wrote:
> +	if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48)) &&
> +	    dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) {

There is no need to fall back to a smaller mask, the core DMA code
just cares about the addressability of the device.