linux-kernel - Re: [PATCH net-next v2 1/9] net: ethernet: implement OPEN Alliance control transaction interface

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Date:   Mon, 23 Oct 2023 23:28:58 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        corbet@....net, steen.hegelund@...rochip.com,
        rdunlap@...radead.org, horms@...nel.org, casper.casan@...il.com,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        horatiu.vultur@...rochip.com, Woojung.Huh@...rochip.com,
        Nicolas.Ferre@...rochip.com, UNGLinuxDriver@...rochip.com,
        Thorsten.Kummermehr@...rochip.com
Subject: Re: [PATCH net-next v2 1/9] net: ethernet: implement OPEN Alliance
 control transaction interface

> +static void oa_tc6_prepare_ctrl_buf(struct oa_tc6 *tc6, u32 addr, u32 val[],
> +				    u8 len, bool wnr, u8 *buf, bool prote)

One of the comments i made last time was that wnr is not obvious. I
assume it means write-not-read. So why not just write? Since it a
boolean, i assume war is never needed, so !wnr cal always be
considered rnw.

And prote could well be protect, the two extra characters make it a
lot more obvious. Or better still.

> +{
> +	u32 hdr;
> +
> +	/* Prepare the control header with the required details */
> +	hdr = FIELD_PREP(CTRL_HDR_DNC, 0) |
> +	      FIELD_PREP(CTRL_HDR_WNR, wnr) |
> +	      FIELD_PREP(CTRL_HDR_AID, 0) |
> +	      FIELD_PREP(CTRL_HDR_MMS, addr >> 16) |
> +	      FIELD_PREP(CTRL_HDR_ADDR, addr) |
> +	      FIELD_PREP(CTRL_HDR_LEN, len - 1);
> +	hdr |= FIELD_PREP(CTRL_HDR_P, oa_tc6_get_parity(hdr));
> +	*(__be32 *)buf = cpu_to_be32(hdr);
> +
> +	if (wnr) {
> +		for (u8 i = 0; i < len; i++) {
> +			u16 pos;
> +
> +			if (!prote) {

nitpick, but please use positive logic. Do the protected case first.

	 Andrew