2020-07-28 12:29:50

by Frank Wunderlich

[permalink] [raw]
Subject: [PATCH v3] net: ethernet: mtk_eth_soc: fix mtu warning

From: Landen Chao <[email protected]>

in recent Kernel-Versions there are warnings about incorrect MTU-Size
like these:

eth0: mtu greater than device maximum
mtk_soc_eth 1b100000.ethernet eth0: error -22 setting MTU to include DSA overhead

Fixes: bfcb813203e6 ("net: dsa: configure the MTU for switch ports")
Fixes: 72579e14a1d3 ("net: dsa: don't fail to probe if we couldn't set the MTU")
Fixes: 7a4c53bee332 ("net: report invalid mtu value via netlink extack")
Signed-off-by: René van Dorst <[email protected]>
Signed-off-by: Frank Wunderlich <[email protected]>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 85735d32ecb0..a1c45b39a230 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2891,6 +2891,8 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
eth->netdev[id]->irq = eth->irq[0];
eth->netdev[id]->dev.of_node = np;

+ eth->netdev[id]->max_mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN;
+
return 0;

free_netdev:
--
2.25.1


2020-07-28 14:18:03

by Andrew Lunn

[permalink] [raw]
Subject: Re: [PATCH v3] net: ethernet: mtk_eth_soc: fix mtu warning

On Tue, Jul 28, 2020 at 02:27:43PM +0200, Frank Wunderlich wrote:
> From: Landen Chao <[email protected]>
>
> in recent Kernel-Versions there are warnings about incorrect MTU-Size
> like these:
>
> eth0: mtu greater than device maximum
> mtk_soc_eth 1b100000.ethernet eth0: error -22 setting MTU to include DSA overhead
>
> Fixes: bfcb813203e6 ("net: dsa: configure the MTU for switch ports")
> Fixes: 72579e14a1d3 ("net: dsa: don't fail to probe if we couldn't set the MTU")
> Fixes: 7a4c53bee332 ("net: report invalid mtu value via netlink extack")
> Signed-off-by: Ren? van Dorst <[email protected]>
> Signed-off-by: Frank Wunderlich <[email protected]>

Reviewed-by: Andrew Lunn <[email protected]>

Andrew

2020-07-28 15:55:23

by Jakub Kicinski

[permalink] [raw]
Subject: Re: [PATCH v3] net: ethernet: mtk_eth_soc: fix mtu warning

On Tue, 28 Jul 2020 14:27:43 +0200 Frank Wunderlich wrote:
> From: Landen Chao <[email protected]>

Hi gents,

if the patch is from Landen we need his sign-off on it.

> in recent Kernel-Versions there are warnings about incorrect MTU-Size
> like these:
>
> eth0: mtu greater than device maximum
> mtk_soc_eth 1b100000.ethernet eth0: error -22 setting MTU to include DSA overhead
>
> Fixes: bfcb813203e6 ("net: dsa: configure the MTU for switch ports")
> Fixes: 72579e14a1d3 ("net: dsa: don't fail to probe if we couldn't set the MTU")
> Fixes: 7a4c53bee332 ("net: report invalid mtu value via netlink extack")
> Signed-off-by: René van Dorst <[email protected]>
> Signed-off-by: Frank Wunderlich <[email protected]>

2020-07-28 16:00:27

by Russell King (Oracle)

[permalink] [raw]
Subject: Re: [PATCH v3] net: ethernet: mtk_eth_soc: fix mtu warning

On Tue, Jul 28, 2020 at 02:27:43PM +0200, Frank Wunderlich wrote:
> From: Landen Chao <[email protected]>
>
> in recent Kernel-Versions there are warnings about incorrect MTU-Size
> like these:

Can the above also be fixed for incorrect capitalisation and improper
hyphernation please?

Thanks.

>
> eth0: mtu greater than device maximum
> mtk_soc_eth 1b100000.ethernet eth0: error -22 setting MTU to include DSA overhead
>
> Fixes: bfcb813203e6 ("net: dsa: configure the MTU for switch ports")
> Fixes: 72579e14a1d3 ("net: dsa: don't fail to probe if we couldn't set the MTU")
> Fixes: 7a4c53bee332 ("net: report invalid mtu value via netlink extack")
> Signed-off-by: Ren? van Dorst <[email protected]>
> Signed-off-by: Frank Wunderlich <[email protected]>
> ---
> drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> index 85735d32ecb0..a1c45b39a230 100644
> --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> @@ -2891,6 +2891,8 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
> eth->netdev[id]->irq = eth->irq[0];
> eth->netdev[id]->dev.of_node = np;
>
> + eth->netdev[id]->max_mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN;
> +
> return 0;
>
> free_netdev:
> --
> 2.25.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> [email protected]
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

2020-07-29 07:50:12

by Landen Chao (趙皎宏)

[permalink] [raw]
Subject: Re: [PATCH v3] net: ethernet: mtk_eth_soc: fix mtu warning

Hi Frank,

If you send next version of patch, you can help to add the Signed-off
line. Thanks.
Signed-off-by: Landen Chao <[email protected]>

On Tue, 2020-07-28 at 23:53 +0800, Jakub Kicinski wrote:
> On Tue, 28 Jul 2020 14:27:43 +0200 Frank Wunderlich wrote:
> > From: Landen Chao <[email protected]>
>
> Hi gents,
>
> if the patch is from Landen we need his sign-off on it.
>
> > in recent Kernel-Versions there are warnings about incorrect MTU-Size
> > like these:
> >
> > eth0: mtu greater than device maximum
> > mtk_soc_eth 1b100000.ethernet eth0: error -22 setting MTU to include DSA overhead
> >
> > Fixes: bfcb813203e6 ("net: dsa: configure the MTU for switch ports")
> > Fixes: 72579e14a1d3 ("net: dsa: don't fail to probe if we couldn't set the MTU")
> > Fixes: 7a4c53bee332 ("net: report invalid mtu value via netlink extack")
> > Signed-off-by: René van Dorst <[email protected]>
> > Signed-off-by: Frank Wunderlich <[email protected]>
>