Re: [PATCH net-next v12 06/15] ax88179_178a: Add HW support for AX179A-based chips

[Jakub Kicinski <kuba@kernel.org>]

On Wed, 16 Sep 2026 05:24:05 +0200 Birger Koblitz wrote:

> +	/* Stop RX/TX for link configuration */
> +	tmp16 = AX_RX_CTL_STOP;
> +	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &tmp16);

don't you want to add a wrapper for the commands? 
To write a cmd from a literal/immediate value?
Something like:

	ax88179_cmd_imm(dev, AX_ACCESS_MAC, AX_RX_CTL, AX_RX_CTL_STOP,
	2);

It'd save you all the temp buffers, which TBH I'm not sure are fully
correct since you cast u8 buf to a pointer which may need alignment.

> +	tmp8 = 0;
> +	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX88179A_MAC_PATH, 1, 1, &tmp8);
> +
> +	tmp8 = 0xa5;
> +	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX88179A_MAC_CDC_DELAY_TX, 1, 1, &tmp8);

Please wrap at 80 chars if it doesn't impact readability.

> +	/* Check these packets */
> +	hdr_off = (rx_hdr & AX179A_RX_DH_DESC_OFFSET_MASK) >> AX179A_RX_DH_DESC_OFFSET_SHIFT;
> +	pkt_cnt = rx_hdr & AX179A_RX_DH_PKT_CNT_MASK;

Please define shifted masks and use FIELD_GET() FIELD_PREP()
Sometimes your masks are shifted sometimes not, makes the code harder
to follow. Not to mention that this is much shorter:

	hdr_off = FILED_GET(AX179A_RX_DH_DESC_OFFSET, rx_hdr);


> +	/* TSO MSS */
> +	tx_desc |= ((u64)(skb_shinfo(skb)->gso_size & AX179A_TX_DESC_MSS_MASK)) <<
> +		   AX179A_TX_DESC_MSS_SHIFT;

(eg. this mask is not shifted)