Subject: Re: [PATCH net-next 07/10] net: stmmac: Enable support for > 32 Bits addressing in XGMAC

From: Andrew Lunn <[email-masked]>
Date: Wed, 26 Jun 2019 22:19:53 +0200

> +
> +	if (priv->dma_cap.addr64) {
> +		ret = dma_set_mask_and_coherent(device,
> +				DMA_BIT_MASK(priv->dma_cap.addr64));
> +		if (!ret)
> +			dev_info(priv->device, "Using %d bits DMA width\n",
> +				 priv->dma_cap.addr64);
> +	}

Hi Jose

If dma_set_mask_and_coherent() fails, i think you are supposed to fall
back to 32 bits. So you might want to clear priv->dma_cap.addr64.

But don't trust my, i could be wrong.

    Andrew