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Re: [PATCH v8 4/5] wifi: mac80211: start and finalize channel switch on link basis

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On Wed, 2024-02-21 at 08:28 +0000, Ping-Ke Shih wrote:
> 
> > -----Original Message-----
> > From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
> > Sent: Wednesday, February 21, 2024 4:20 PM
> > To: Ping-Ke Shih <pkshih@xxxxxxxxxxx>; Aditya Kumar Singh <quic_adisi@xxxxxxxxxxx>
> > Cc: linux-wireless@xxxxxxxxxxxxxxx; Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>; Ilan Peer
> > <ilan.peer@xxxxxxxxx>; Jouni Malinen <j@xxxxx>; Ryder Lee <ryder.lee@xxxxxxxxxxxx>; Arend van Spriel
> > <arend.vanspriel@xxxxxxxxxxxx>; Felix Fietkau <nbd@xxxxxxxxxxx>
> > Subject: Re: [PATCH v8 4/5] wifi: mac80211: start and finalize channel switch on link basis
> > 
> > On Wed, 2024-02-21 at 08:19 +0000, Ping-Ke Shih wrote:
> > > > -----Original Message-----
> > > > From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
> > > > Sent: Wednesday, February 21, 2024 4:10 PM
> > > > To: Ping-Ke Shih <pkshih@xxxxxxxxxxx>; Aditya Kumar Singh <quic_adisi@xxxxxxxxxxx>
> > > > Cc: linux-wireless@xxxxxxxxxxxxxxx; Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>; Ilan Peer
> > > > <ilan.peer@xxxxxxxxx>; Jouni Malinen <j@xxxxx>; Ryder Lee <ryder.lee@xxxxxxxxxxxx>; Arend van Spriel
> > > > <arend.vanspriel@xxxxxxxxxxxx>; Felix Fietkau <nbd@xxxxxxxxxxx>
> > > > Subject: Re: [PATCH v8 4/5] wifi: mac80211: start and finalize channel switch on link basis
> > > > 
> > > > I guess that'd also apply to probe responses? Or does it not send those
> > > > at all? But we discussed before that maybe we don't have to be perfect
> > > > there, so I guess we can find some solution to that.
> > > 
> > > Unfortunately, Realtek firmware doesn't send probe responses at all. Still
> > > need hostapd to reply those.
> > > 
> > 
> > Right, but filling in the CSA counters?
> > 
> 
> No, firmware doesn't modify content of probe response frame.
> 

Can you get that fixed? ;-)

With differing beacon intervals etc., I don't know there's a good way to
keep the counters even with a semblance of correctness, especially if we
don't know when the beacon was transmitted?

Or maybe just fill it in the driver since you probably have some beacon
timing data more easily accessible?

johannes





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