Re: stable backport: wifi: mac80211: track capability/opmode NSS separately

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On Sat, Jul 27, 2024 at 12:54:21AM +0200, Hauke Mehrtens wrote:
> Hi,
> 
> Please backport the following patch back to the stable series 6.6 and 6.1:
> commit a8bca3e9371dc5e276af4168be099b2a05554c2a
> Author: Johannes Berg <johannes.berg@xxxxxxxxx>
> Date:   Wed Feb 28 12:01:57 2024 +0100
> 
>     wifi: mac80211: track capability/opmode NSS separately
> 
> There is a small conflict in the copyright year update in
> net/mac80211/sta_info.h, just take the 2024 version.
> 
> 
> On kernel 6.1 please backport this patch first to make the other one apply:
> commit 57b341e9ab13e5688491bfd54f8b5502416c8905
> Author: Rameshkumar Sundaram <quic_ramess@xxxxxxxxxxx>
> Date:   Tue Feb 7 17:11:46 2023 +0530
> 
>     wifi: mac80211: Allow NSS change only up to capability
> 
> 
> 
> This commit fixes a throughput regression introduced into Linux stable with
> the backport of following commit:
> 
> commit dd6c064cfc3fc18d871107c6f5db8837e88572e4
> Author: Johannes Berg <johannes.berg@xxxxxxxxx>
> Date:   Mon Jan 29 15:53:55 2024 +0100
> 
>     wifi: mac80211: set station RX-NSS on reconfig
> 
> On older kernel versions it is harder to backport the fixes, maybe revert
> the offending commit in Linux stable 5.15 and older.
> 
> This regression was found by multiple users of OpenWrt in Wifi AP mode.
> See the discussion in this forum thread:
> https://forum.openwrt.org/t/openwrt-23-05-4-service-release/204514/111
> 
> Thank you KONG from the OpenWrt forum for finding the commit which reduced
> the Wifi throughput.

This is a bit complex, please provide a series of backported patches for
each tree that you have tested and done the needed changes to get
working properly.  Otherwise, the above descriptions are going to take a
long time for us to get to, sorry, as we have much more "simpler" things
to backport at this point in time.

thanks,

greg k-h




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