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SubjectRe: PROBLEM: 5.3.0-rc* causes iwlwifi failure
Date

> I am on an Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz running Linux
> x86_64 (Slackware), with a custom-compiled 5.3.0-rc4 (.config
> attached).
>
> I am using the Intel wifi adapter on this machine:
>
> 02:00.0 Network controller: Intel Corporation Device 24fb (rev 10)
>
> with the iwlwifi driver. I am attaching the output to 'lspci -vv -s
> 02:00.0' as the file device-info.
>
> All 5.3.0-rc* versions I have tried (including rc4) cause multiple
> dmesg iwlwifi-related errors (dmesg attached). Examples:
>
> iwlwifi 0000:02:00.0: Failed to get geographic profile info -5
> iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x82000000
> iwlwifi 0000:02:00.0: 0x00000038 | BAD_COMMAND
>

I have my logs filled with similar garbage throughout 5.3-rc*. Also
since 5.3-rcsomething not only it WARNS in dmesg about firmware failure,
but completely stops working after suspend/resume cycle.

It looks like that:

commit 4fd445a2c855bbcab81fbe06d110e78dbd974a5b
Author: Haim Dreyfuss <haim.dreyfuss@intel.com>
Date: Thu May 2 11:45:02 2019 +0300

iwlwifi: mvm: Add log information about SAR status

Inform users when SAR status is changing.

Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>


is the culprit. (manually) reverting it on top of 5.3-rc4 makes
everything work again.

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