linux-kernel - Re: [PATCH] iwlwifi: pcie: restore support for Killer Qu C0 NICs

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Date:   Tue, 03 Mar 2020 07:40:26 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Leho Kraav <leho@...av.com>
Cc:     "Jan Alexander Steffens \(heftig\)" <jan.steffens@...il.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iwlwifi: pcie: restore support for Killer Qu C0 NICs

Leho Kraav <leho@...av.com> writes:

> On Tue, Dec 24, 2019 at 06:16:39AM +0100, Jan Alexander Steffens (heftig) wrote:
>> Commit 809805a820c6 ("iwlwifi: pcie: move some cfg mangling from
>> trans_pcie_alloc to probe") refactored the cfg mangling. Unfortunately,
>> in this process the lines which picked the right cfg for Killer Qu C0
>> NICs after C0 detection were lost. These lines were added by commit
>> b9500577d361 ("iwlwifi: pcie: handle switching killer Qu B0 NICs to
>> C0").
>> 
>> I suspect this is more of the "merge damage" which commit 7cded5658329
>> ("iwlwifi: pcie: fix merge damage on making QnJ exclusive") talks about.
>> 
>> Restore the missing lines so the driver loads the right firmware for
>> these NICs.
>
> This seems real, as upgrading 5.5.0 -> 5.5.5 just broke my iwlwifi on XPS 7390.
> How come?

Luca, should I apply this to wireless-drivers?

https://patchwork.kernel.org/patch/11309095/

-- 
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches