linux-kernel - RE: [PATCH net-next 3/4] fec: add FIXME to move 'mac_managed

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Message-ID: <DB9PR04MB8106C492FAAE4D7BE9CB731688BF9@DB9PR04MB8106.eurprd04.prod.outlook.com>
Date:   Wed, 15 Mar 2023 05:48:49 +0000
From:   Wei Fang <wei.fang@....com>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
CC:     "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        Shenwei Wang <shenwei.wang@....com>,
        Clark Wang <xiaoning.wang@....com>,
        dl-linux-imx <linux-imx@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net-next 3/4] fec: add FIXME to move 'mac_managed_pm' to
 probe

Hello Wolfram,

> -----Original Message-----
> From: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Sent: 2023年3月14日 21:15
> To: netdev@...r.kernel.org
> Cc: linux-renesas-soc@...r.kernel.org; kernel@...gutronix.de; Wolfram Sang
> <wsa+renesas@...g-engineering.com>; Wei Fang <wei.fang@....com>;
> Shenwei Wang <shenwei.wang@....com>; Clark Wang
> <xiaoning.wang@....com>; dl-linux-imx <linux-imx@....com>; David S.
> Miller <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>;
> Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>;
> linux-kernel@...r.kernel.org
> Subject: [PATCH net-next 3/4] fec: add FIXME to move 'mac_managed_pm' to
> probe
> 
> On Renesas hardware, we had issues because the above flag was set during
> 'open'. It was concluded that it needs to be set during 'probe'. It looks like FEC
> needs the same fix but I can't test it because I don't have the hardware. At
> least, leave a note about the issue.
> 

Could you describe this issue in more details? So that I can reproduce and fix this
issue and test it. Thanks!

> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> ---
>  drivers/net/ethernet/freescale/fec_main.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/ethernet/freescale/fec_main.c
> b/drivers/net/ethernet/freescale/fec_main.c
> index c73e25f8995e..b16f56208d66 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -2318,6 +2318,7 @@ static int fec_enet_mii_probe(struct net_device
> *ndev)
>  	fep->link = 0;
>  	fep->full_duplex = 0;
> 
> +	/* FIXME: should be set right after mdiobus is registered */
>  	phy_dev->mac_managed_pm = true;
> 
>  	phy_attached_info(phy_dev);
> --
> 2.30.2