net: iwlwifi: ax200: Firmware crashes on startup (fwd from bugzilla)

net: iwlwifi: ax200: Firmware crashes on startup (fwd from bugzilla)

[Thorsten Leemhuis]

Lo! There is a regression dealt with in bugzilla I'd like to add to the
tracking:

#regzbot introduced: v5.15..v5.16
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215488
#regzbot from: Bernhard Rosenkränzer <bero@lindev.ch>
#regzbot title: net: iwlwifi: ax200: Firmware crashes on startup

> With kernel 5.16.0 (and current linux-firmware), the iwlwifi driver
> doesn't work at all because the firmware crashes on load.
> 
> Bisecting shows the problem is the newer firmware versions loaded by
> 5.16.0 -- reverting to iwlwifi-cc-a0-66.ucode (with the driver
> otherwise unchanged) makes it work.
Latest status:

> We have a direction for a fix.
> A *valid* W/A till we deliver will be to compile with IWLWIFI_BCAST_FILTERING  disabled.
Ciao, Thorsten

Re: net: iwlwifi: ax200: Firmware crashes on startup (fwd from bugzilla) #forregzbot

[Thorsten Leemhuis]

#regzbot fixed-by: 92883a524ae918736a7b8acef

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=92883a524ae918736a7b8acef98698075507b8c1

> iwlwifi: remove deprecated broadcast filtering feature
> This feature has been deprecated and should not be used anymore.  With
> newer firmwares, namely *-67.ucode and above, trying to use it causes an
> assertion failure in the FW, similar to this:
> 
> [Tue Jan 11 20:05:24 2022] iwlwifi 0000:04:00.0: 0x00001062 | ADVANCED_SYSASSERT
> 
> In order to prevent this feature from being used, remove it entirely
> and get rid of the Kconfig option that
> enables it (IWLWIFI_BCAST_FILTERING).
> 
> Fixes: cbaa6aeedee5 ("iwlwifi: bump FW API to 67 for AX devices")
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=215488
> Cc: stable@vger.kernel.org # 5.16.x

TWIMC: this mail is primarily send for documentation purposes and for
regzbot, my Linux kernel regression tracking bot. These mails usually
contain '#forregzbot' in the subject, to make them easy to spot and filter.

On 20.01.22 16:07, Thorsten Leemhuis wrote:
> 
> Lo! There is a regression dealt with in bugzilla I'd like to add to the
> tracking:
> 
> #regzbot introduced: v5.15..v5.16
> #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215488
> #regzbot from: Bernhard Rosenkränzer <bero@lindev.ch>
> #regzbot title: net: iwlwifi: ax200: Firmware crashes on startup
> 
>> With kernel 5.16.0 (and current linux-firmware), the iwlwifi driver
>> doesn't work at all because the firmware crashes on load.
>>
>> Bisecting shows the problem is the newer firmware versions loaded by
>> 5.16.0 -- reverting to iwlwifi-cc-a0-66.ucode (with the driver
>> otherwise unchanged) makes it work.
> Latest status:
> 
>> We have a direction for a fix.
>> A *valid* W/A till we deliver will be to compile with IWLWIFI_BCAST_FILTERING  disabled.
> Ciao, Thorsten