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From: Andrew Lunn <andrew@lunn.ch>
To: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org,
	pabeni@redhat.com, edumazet@google.com,
	linux-kernel@vger.kernel.org, bryan.whitehead@microchip.com,
	UNGLinuxDriver@microchip.com
Subject: Re: [PATCH net V2 2/2] net: lan743x: support WOL in MAC even when PHY does not
Date: Wed, 20 Mar 2024 23:53:10 +0100	[thread overview]
Message-ID: <22089299-a3e2-4cbd-942a-65ea070657b8@lunn.ch> (raw)
In-Reply-To: <20240320042107.903051-3-Raju.Lakkaraju@microchip.com>

> +	if (netdev->phydev) {
> +		ret = phy_ethtool_set_wol(netdev->phydev, wol);
> +		if (ret != -EOPNOTSUPP && ret != 0)
> +			return ret;

I'm not sure this condition is correct.

If there is an error, and the error is not EOPNOTSUPP, you want to
report that error. However, if the PHY can support the WoL
configuration, it will return 0, and this function should exit, WoL in
the MAC is not needed. And doing WoL in the PHY consumes less power
since you can suspend the MAC.

So i think it should simply be:

> +		if (ret != -EOPNOTSUPP)
> +			return ret;

Do you have a board with this MAC with a PHY which does have some WoL
support. Could you test PHY WoL is used when appropriate?

	Andrew

  parent reply	other threads:[~2024-03-20 22:53 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-20  4:21 [PATCH net V2 0/2] net: lan743x: Fixes for multiple WOL related issues Raju Lakkaraju
2024-03-20  4:21 ` [PATCH net V2 1/2] net: lan743x: disable WOL upon resume to restore full data path operation Raju Lakkaraju
2024-03-20 13:53   ` Jiri Pirko
2024-03-20  4:21 ` [PATCH net V2 2/2] net: lan743x: support WOL in MAC even when PHY does not Raju Lakkaraju
2024-03-20 13:51   ` Jiri Pirko
2024-03-20 22:53   ` Andrew Lunn [this message]
2024-03-20 22:59     ` Florian Fainelli
2024-04-05  8:17     ` Raju.Lakkaraju
2024-04-05 17:12       ` Andrew Lunn
2024-04-23 11:05         ` Raju.Lakkaraju
2024-04-23 19:10           ` Andrew Lunn
2024-04-24  5:58             ` Ronnie.Kunin
2024-04-24  6:07               ` Ronnie.Kunin
2024-04-24 12:13               ` Andrew Lunn
2024-04-25 11:37             ` Raju.Lakkaraju
2024-04-25 14:13               ` Andrew Lunn
2024-04-26  7:43                 ` Ronnie.Kunin

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