linux-kernel - Re: [PATCH v2 net-next 1/3] net: dsa: lan9303: Refactor lan9303_xxx_packet

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Message-ID: <20170801133934.GB23157@lunn.ch>
Date:   Tue, 1 Aug 2017 15:39:34 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Egil Hjelmeland <privat@...l-hjelmeland.no>
Cc:     vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: Re: [PATCH v2 net-next 1/3] net: dsa: lan9303: Refactor
 lan9303_xxx_packet_processing()

> @@ -704,7 +710,7 @@ static void lan9303_get_ethtool_stats(struct dsa_switch *ds, int port,
>  	unsigned int u, poff;
>  	int ret;
>  
> -	poff = port * 0x400;
> +	poff = LAN9303_SWITCH_PORT_REG(port, 0);
>  
>  	for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
>  		ret = lan9303_read_switch_reg(chip,

So the actual code is:

	for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
       		ret = lan9303_read_switch_reg(chip,
			      		      lan9303_mib[u].offset + poff,
					      &reg);

Could this be written as

	for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
		ret = lan9303_read_switch_port(chip, port, lan9303_mib[u].offset, &reg);

It is then clear you are reading the statistics from a port register.

   Andrew