Re: iwlwifi devices disappear after suspend on kernel 5.17

["Grumbach, Emmanuel" <emmanuel.grumbach@intel.com>]

On Tue, 2022-04-19 at 22:58 +0200, Toke Høiland-Jørgensen wrote:
> "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
> 

So you do get a SAP connection. Weird.
Checking with the CSME guys.
Can you get dynamic debug prints for iwlmei module?
Best would be tracing with -e iwlmei_sap_cmd

I might also need dynamic debgug prints from the mei bus driver but that will be for later.
Thanks for reporting and providing the data!