linux-kernel - Re: Intel Wireless 7260 failed to work

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Message-ID: <CANUX_P2ivxo6K6sy9d-OK5DAkcYeGb_43XQwazj+QPGk83EG1g@mail.gmail.com>
Date:   Wed, 28 Dec 2016 10:17:44 +0200
From:   Emmanuel Grumbach <egrumbach@...il.com>
To:     Peter Xu <peterx@...hat.com>
Cc:     Luca Coelho <luca@...lho.fi>, Kalle Valo <kvalo@...eaurora.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: Intel Wireless 7260 failed to work

On Wed, Dec 28, 2016 at 10:10 AM, Peter Xu <peterx@...hat.com> wrote:
> On Wed, Dec 28, 2016 at 09:27:15AM +0200, Luca Coelho wrote:
>
> [...]
>
>> > > > Is this a known issue? Please let me know if anyone wants more info or
>> > > > logs, since this error triggers easily (everytime I boot).
>> > >
>> > > The error message isn't really telling much to the user (hint hint) but
>> > > I suspect this is by design:
>> > >
>> > > "iwlwifi: remove support for fw older than -17 and -22
>>
>> Right, we only maintain support for a certain number of firmware
>> versions.  The FW APIs change with time and we don't want to keep all
>> legacy code supporting old firmwares in the driver forever.
>>
>> I agree that "no suitable firmware found!" is a bit scarce.  I'll see
>> if we can improve that with something: "no suitable firmware found! You
>> need iwlwifi-7260-17.ucode (<link to git>)".
>
> That'll be great if we can have this info in the log. Maybe no need
> for a full URL, the firmware name would suffice at least for me.

In this case, I think we should also print the range that is supported
when we fail to find any suitable firmware.

>
> [...]
>
>> I don't think we are very aggressive, we have been supporting -17 since
>> v4.3:
>>
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5865f3658ba37c54e346b0fdee08a1c7a152681b
>>
>> And we have published the firmware about half a year ago:
>>
>> http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/commit/iwlwifi-7260-17.ucode?id=f2cf4d67e8eced29c8a473d3a27057aa2df57c42
>>
>> I understand your concern, but if you want to be on the bleeding-edge
>> kernel, you should be on the bleeding-edge linux-firmware as well. ;)
>
> Fair enough. :-)
>
>>
>> But as I said, I'll try to improve the error message, as that should
>> make it easier to figure out.
>
> Thank you!
>
> -- peterx