linux-kernel - Re: Fwd: linux v4.14 causes firmware iwlwifi errors on Lenovo Thinkpad T440s

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Date:   Mon, 13 Nov 2017 16:23:03 -0600
From:   Larry Finger <Larry.Finger@...inger.net>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>
Subject: Re: Fwd: linux v4.14 causes firmware iwlwifi errors on Lenovo
 Thinkpad T440s

On 11/13/2017 03:30 PM, Bartosz Golaszewski wrote:
> 2017-11-13 21:45 GMT+01:00 Larry Finger <Larry.Finger@...inger.net>:
>> On 11/13/2017 02:22 PM, Bartosz Golaszewski wrote:
>>>
>>> Forwarding here too as I messed up the address the last time.
>>> --
>>>
>>> Hi,
>>>
>>> I noticed my wireless interface can't get up with linux v4.14 and the
>>> kernel log is flooded with firmware errors:
>>>
>>> iwlwifi 0000:03:00.0: Firmware error during reconfiguration - reprobe!
>>> iwlwifi 0000:03:00.0: FW error in SYNC CMD DQA_ENABLE_CMD
>>>
>>> and
>>>
>>> ieee80211 phy63: Hardware restart was requested.
>>>
>>> The wireless controller is: Intel Corporation Wireless 7260 (rev 83)
>>> Firmware used is: iwlwifi-7260-17
>>>
>>> Everything works fine with v4.13.12.
>>>
>>> I didn't have time today to bisect for the offending commit. Full log
>>> uploaded[1].
>>>
>>> Best regards,
>>> Bartosz Golaszewski
>>>
>>> [1] https://pastebin.com/jksqxvS6
>>
>>
>> Your log shows "iwlwifi 0000:03:00.0: loaded firmware version 17.228510.0
>> op_mode iwlmvm"
>>
>> Mine, where the 7260 works, shows "iwlwifi 0000:04:00.0: loaded firmware
>> version 17.459231.0 op_mode iwlmvm".
>>
>> It seems as if you need newer firmware. A detailed file listing shows
>> "-rw-r--r-- 1 root root 1049340 Oct  9 12:03
>> /lib/firmware/iwlwifi-7260-17.ucode". That date is likely when I installed
>> the updated kernel firmware package from my distro. The md5sum for the file
>> is 73a217f55c47d3a70bb5dbbe1d676423.
>>
>> Larry
>>
> 
> Ok so it seems the version in linux-firmware is outdated. The file
> you're using is available on github[1] and fixed the issue for me.
> 
> Thanks!
> Bartosz Golaszewski
> 
> [1] https://github.com/OpenELEC/iwlwifi-firmware

Interesting. Using md5sum of the git repo for linux-firmware gets
73a217f55c47d3a70bb5dbbe1d676423  iwlwifi-7260-17.ucode.

That is the file I'm using.

Larry