linux-kernel - Re: [net-next PATCH 2/2] net: ravb: Fix R-Car RX frame size limit

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Date: Mon, 17 Jun 2024 23:18:33 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Paul Barker <paul.barker.ct@...renesas.com>, "David S. Miller"
	<davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
	<kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
CC: Biju Das <biju.das.jz@...renesas.com>, Claudiu Beznea
	<claudiu.beznea.uj@...renesas.com>, Lad Prabhakar
	<prabhakar.mahadev-lad.rj@...renesas.com>, Mitsuhiro Kimura
	<mitsuhiro.kimura.kc@...esas.com>, <netdev@...r.kernel.org>,
	<linux-renesas-soc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [net-next PATCH 2/2] net: ravb: Fix R-Car RX frame size limit

On 6/15/24 1:30 PM, Paul Barker wrote:

> The RX frame size limit should not be based on the current MTU setting.
> Instead it should be based on the hardware capabilities.
> 
> Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
> Signed-off-by: Paul Barker <paul.barker.ct@...renesas.com>

Reviewed-by: Sergey Shtylyov <s.shtylyov@....ru>

   Sounds like this is also a fix for net.git tho?

[...]

> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 02cbf850bd85..481c854cb305 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -555,8 +555,10 @@ static void ravb_emac_init_gbeth(struct net_device *ndev)
>  
>  static void ravb_emac_init_rcar(struct net_device *ndev)
>  {
> +	struct ravb_private *priv = netdev_priv(ndev);
> +
>  	/* Receive frame limit set register */
> -	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
> +	ravb_write(ndev, priv->info->rx_max_frame_size + ETH_FCS_LEN, RFLR);

   Aha, that's what we're doing in ravb_emac_init_gbeth()...

[...]

MBR, Sergey