RE: [Intel-wired-lan] [PATCH iwl-net] idpf: account for VLAN header when parsing RSC packet header

> -----Original Message-----
> From: Intel-wired-lan <[email protected]> On Behalf Of
> Loktionov, Aleksandr
> Sent: Thursday, July 30, 2026 6:53 AM
> To: Hay, Joshua A <[email protected]>; [email protected]
> Cc: [email protected]
> Subject: Re: [Intel-wired-lan] [PATCH iwl-net] idpf: account for VLAN header
> when parsing RSC packet header
> 
> 
> 
> > -----Original Message-----
> > From: Intel-wired-lan <[email protected]> On Behalf
> > Of Joshua Hay
> > Sent: Tuesday, July 28, 2026 1:09 AM
> > To: [email protected]
> > Cc: [email protected]
> > Subject: [Intel-wired-lan] [PATCH iwl-net] idpf: account for VLAN
> > header when parsing RSC packet header
> >
> > While parsing the header of a Receive Side Coalesced (RSC) packet,
> > check if a VLAN tag is present and adjust the header parsing
> > accordingly.
> > Otherwise, Rx TCP traffic is completely broken for any VLAN interface
> > whose underlying interface has RSC (rx-gro-hw) enabled.
> >
> > We only need to worry about one VLAN header since Rx packets with
> > multiple VLAN headers are not candidates for RSC.
> >
> > Fixes: 3a8845af66edb ("idpf: add RX splitq napi poll support")
> > Signed-off-by: Joshua Hay <[email protected]>
> > Reviewed-by: Emil Tantilov <[email protected]>
> > ---
> > 2.39.2
> 
> Reviewed-by: Aleksandr Loktionov <[email protected]>

Tested-by: Samuel Salin <[email protected]>