netdev - Re: Intel 7560 LTE Modem stops working after resuming from standby

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Message-ID: <f8387cd2-032e-4231-9769-a8229b573614@gmail.com>
Date: Tue, 17 Oct 2023 14:08:51 +0700
From: Bagas Sanjaya <bagasdotme@...il.com>
To: Loic Poulain <loic.poulain@...aro.org>
Cc: M Chetan Kumar <m.chetan.kumar@...ux.intel.com>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 Linux Regressions <regressions@...ts.linux.dev>,
 Linux Networking <netdev@...r.kernel.org>,
 Linux Intel Wireless WAN <linuxwwan@...el.com>,
 "David S. Miller" <davem@...emloft.net>,
 Sergey Ryazanov <ryazanov.s.a@...il.com>,
 Johannes Berg <johannes@...solutions.net>
Subject: Re: Intel 7560 LTE Modem stops working after resuming from standby

On 16/10/2023 20:18, Loic Poulain wrote:
> Hi Bagas,
> 
> On Fri, 13 Oct 2023 at 02:04, Bagas Sanjaya <bagasdotme@...il.com> wrote:
>>
>> On Thu, Oct 12, 2023 at 06:54:11PM +0200, Loic Poulain wrote:
>>> Hi Chetan,
>>>
>>> On Thu, 12 Oct 2023 at 11:52, Bagas Sanjaya <bagasdotme@...il.com> wrote:
>>>> I notice a regression report on Bugzilla [1]. Quoting from it:
>>>>
>>>>> I noticed a few days ago, after Fedora moved to Kernel 6.5, that my Intel LTE Modem was not working anymore after resuming from standby.
>>>>>
>>>>> The journal listed this error message multiple times:
>>>>> kernel: iosm 0000:01:00.0: msg timeout
>>>>>
>>>>> It took me a while to determine the root cause of the problem, since the modem did not work either in the following warm reboots.
>>>>> Only a shutdown revived the modem.
>>>>>
>>>>> I did a bisection of the error and I was able to find the culprit:
>>>>>
>>>>> [e4f5073d53be6cec0c654fac98372047efb66947] net: wwan: iosm: enable runtime pm support for 7560
>>>
>>> Any quick fix for this issue? alternatively we will probably revert e4f5073d53.
>>
>> Chetan can't be contacted as sending to his address bounces (error 550)
>> (had he left Intel?). Last message on LKML is this culprit patch [1].
>> Hence, revert for now.
> 
> Could you please submit the revert fix?
> 

OK, will do.

-- 
An old man doll... just what I always wanted! - Clara