netdev - RE: [PATCH net-next] net: dsa: mv88e6xxx: implement USXGMII mode for mv88e6393x

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Message-ID:
 <BYAPR14MB29187B85C91334F4FB3122EAE3449@BYAPR14MB2918.namprd14.prod.outlook.com>
Date: Sat, 27 May 2023 16:08:01 +0000
From: Michal Smulski <michal.smulski@...a.com>
To: Simon Horman <simon.horman@...igine.com>
CC: "andrew@...n.ch" <andrew@...n.ch>, "f.fainelli@...il.com"
	<f.fainelli@...il.com>, "olteanv@...il.com" <olteanv@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net-next] net: dsa: mv88e6xxx: implement USXGMII mode for
 mv88e6393x

This is a good catch. I will fix this and resubmit the patch.

-----Original Message-----
From: Simon Horman <simon.horman@...igine.com> 
Sent: Saturday, May 27, 2023 6:29 AM
To: Michal Smulski <msmulski2@...il.com>
Cc: andrew@...n.ch; f.fainelli@...il.com; olteanv@...il.com; netdev@...r.kernel.org; Michal Smulski <michal.smulski@...a.com>
Subject: Re: [PATCH net-next] net: dsa: mv88e6xxx: implement USXGMII mode for mv88e6393x

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On Fri, May 26, 2023 at 05:21:44PM -0700, Michal Smulski wrote:
> Enable USXGMII mode for mv88e6393x chips. Tested on Marvell 88E6191X.
>
> Signed-off-by: Michal Smulski <michal.smulski@...a.com>

...

> @@ -1477,7 +1481,8 @@ static int mv88e6393x_serdes_erratum_5_2(struct mv88e6xxx_chip *chip, int lane,
>        * to SERDES operating in 10G mode. These registers only apply to 10G
>        * operation and have no effect on other speeds.
>        */
> -     if (cmode != MV88E6393X_PORT_STS_CMODE_10GBASER)
> +     if (cmode != MV88E6393X_PORT_STS_CMODE_10GBASER ||
> +         cmode != MV88E6393X_PORT_STS_CMODE_USXGMII)

Perhaps naïvely, this seems like it will always be true.
Should it be:

        if (cmode != MV88E6393X_PORT_STS_CMODE_10GBASER &&
            cmode != MV88E6393X_PORT_STS_CMODE_USXGMII)