lkml.org 
[lkml]   [2022]   [Nov]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 08/14] net: vlan: remove invalid VLAN protocol warning
On Mon, Nov 07, 2022 at 07:54:46PM +0100, Felix Fietkau wrote:
> On MTK SoC ethernet, using NETIF_F_HW_VLAN_CTAG_RX in combination with hardware
> special tag parsing can pass the special tag port metadata as VLAN protocol ID.
> When the results is added as a skb hwaccel VLAN tag, it triggers a warning from
> vlan_do_receive before calling the DSA tag receive function.
> Remove this warning in order to properly pass the tag to the DSA receive function,
> which will parse and clear it.
>
> Signed-off-by: Felix Fietkau <nbd@nbd.name>
> ---
> net/8021q/vlan.h | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
> index 5eaf38875554..3f9c0406b266 100644
> --- a/net/8021q/vlan.h
> +++ b/net/8021q/vlan.h
> @@ -44,7 +44,6 @@ static inline int vlan_proto_idx(__be16 proto)
> case htons(ETH_P_8021AD):
> return VLAN_PROTO_8021AD;
> default:
> - WARN(1, "invalid VLAN protocol: 0x%04x\n", ntohs(proto));

Why would you ever want to remove a warning that's telling you you're
doing something wrong?

Aren't you calling __vlan_hwaccel_put_tag() with the wrong thing (i.e.
htons(RX_DMA_VPID()) as opposed to VPID translated to something
digestible by the rest of the network stack.. ETH_P_8021Q, ETH_P_8021AD
etc)?

> return -EINVAL;
> }
> }
> --
> 2.38.1
>

\
 
 \ /
  Last update: 2022-11-07 22:58    [W:0.200 / U:1.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site