Re: iwlwifi devices disappear after suspend on kernel 5.17

["Toke Høiland-Jørgensen" <toke@toke.dk>]

"Grumbach, Emmanuel" <emmanuel.grumbach@intel.com> writes:

> On Tue, 2022-04-19 at 20:46 +0300, Grumbach, Emmanuel wrote:
>> On Tue, 2022-04-19 at 13:33 +0200, Toke Høiland-Jørgensen wrote:
>> > "Grumbach, Emmanuel" <emmanuel.grumbach@intel.com> writes:
>> > 
>> > > On Tue, 2022-04-19 at 09:41 +0300, Grumbach, Emmanuel wrote:
>> > > > Hi Toke,
>> > > > 
>> > > > On Tue, 2022-04-19 at 06:24 +0000, Coelho, Luciano wrote:
>> > > > > On Mon, 2022-04-18 at 13:36 +0200, Toke Høiland-Jørgensen wrote:
>> > > > > > Hi Luca
>> > > > > 
>> > > > > Hi Toke,
>> > > > > 
>> > > > > > I've started seeing issues with my iwlwifi interface going away after
>> > > > > > suspend. I get errors like these in dmesg:
>> > > > > > 
>> > > > > > [104393.142264] wlan0: deauthenticating from 4c:60:de:ea:b8:58 by local choice (Reason:
>> > > > > > 3=DEAUTH_LEAVING)
>> > > > > > [104393.347775] iwlmei 0000:00:16.0-13280904-7792-4fcb-a1aa-5e70cbb1e865: Couldn't get
>> > > > > > ACK
>> > > > > > from
>> > > > > > CSME on HOST_GOES_DOWN message
>> > > > > > [104393.347876] iwlmei 0000:00:16.0-13280904-7792-4fcb-a1aa-5e70cbb1e865: failed to send
>> > > > > > the
>> > > > > > SAP_ME_MSG_CHECK_SHARED_AREA message -19
>> > > > > > 
>> > > > > > And when the host comes back up, there is no connectivity. Restarting
>> > > > > > iwd fixes the problem.
>> > > > > > 
>> > > > > > This is on a 5.17.3 kernel (Arch Linux distribution kernel), and lspci
>> > > > > > says the WiFi device is an "Intel Corporation Wi-Fi 6 AX201".
>> > > > > > 
>> > > > > > Any ideas? :)
>> > > > > 
>> > > > > This seems to be related to iwlmei, so I added Emmanuel to the thread.
>> > > > > 
>> > > > 
>> > > > Can we have the full dmesg output?
>> > > > What NIC / platform do you have?
>> > > > Do you have AMT configured in the BIOS?
>> > > > Did you enable wireless operation in AMT?
>> > > 
>> > > Ah - this is AX201, ok, but I still need the platform and thefull dmesg :-)
>> > 
>> > It's a Lenovo ThinkPad X1 Carbon Gen 9, model 20XXS3HC26; AMT is set to
>> > "Disabled" in the BIOS. I rebooted and did a suspend/wake cycle after
>> > connecting to the WiFi network, which produced the dmesg below.
>> 
>> Thanks.
>> This is a Skylake platform and we didn't have a handshake with CSME which is not enabled. We are
>> missing a check before we shut down iwlmei.
>
> Hm... no, that seems to be 11th generation... so TigerLake?
> But still, the fix below seems relevant.

Hmm, tried the patch and the message is still there (as is the bug)...
The error code is different now, though:

[   65.773731] wlan0: deauthenticating from 4c:60:de:ea:b8:5a by local choice (Reason: 3=DEAUTH_LEAVING)
[   65.973767] iwlmei 0000:00:16.0-13280904-7792-4fcb-a1aa-5e70cbb1e865: Couldn't get ACK from CSME on HOST_GOES_DOWN message
[   65.973845] iwlmei 0000:00:16.0-13280904-7792-4fcb-a1aa-5e70cbb1e865: failed to send the SAP_ME_MSG_CHECK_SHARED_AREA message -14

-Toke