Re: [RFC net-next v3 7/7] net: devmem: allow binding on rx queues with same MA devices

[Jakub Kicinski]

On Fri, 15 Aug 2025 14:03:48 +0300 Dragos Tatulea wrote:
> +		rxq_dma_dev = netdev_queue_get_dma_dev(netdev, rxq_idx);
> +		/* Multi-PF netdev queues can belong to different DMA devoces.
> +		 * Block this case.
> +		 */
> +		if (rxq_dma_dev && dma_dev && rxq_dma_dev != dma_dev) {

Why rxq_dma_dev ? 🤔️
Don't we want to error out if the first queue gave us a DMA dev but the
second gave us a NULL ?

> +			NL_SET_ERR_MSG(extack, "Can't bind to queues from different dma devices");

_FMT the conflicting queue IDs into this?