linux-kernel - Re: [PATCH ath-next v2 0/6] wifi: ath11k: bring hibernation support back

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Message-ID: <85c7729a-c410-43c6-9819-bd7ce415f406@quicinc.com>
Date: Thu, 27 Mar 2025 09:52:33 +0800
From: Baochen Qiang <quic_bqiang@...cinc.com>
To: Julian Wollrath <jwollrath@....de>
CC: Johannes Berg <johannes@...solutions.net>,
        Jeff Johnson
	<jjohnson@...nel.org>, <linux-wireless@...r.kernel.org>,
        <ath11k@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        Muhammad Usama
 Anjum <usama.anjum@...labora.com>
Subject: Re: [PATCH ath-next v2 0/6] wifi: ath11k: bring hibernation support
 back



On 3/27/2025 1:48 AM, Julian Wollrath wrote:
> Hi,
> 
> Am Mi, 26 Mär 2025 09:33:04 +0800
> schrieb Baochen Qiang <quic_bqiang@...cinc.com>:
> 
>> To handle the Lenovo unexpected wakeup issue [1], previously we revert
>> commit 166a490f59ac ("wifi: ath11k: support hibernation"). However we
>> need to bring it back, of course with additional changes such that
>> Lenovo machines would not break.
>>
>> For suspend (S3), as those machines work well in WoWLAN mode, the
>> thought here is that we put WLAN target into WoWLAN mode on those
>> machines while into non-WoWLAN mode (which is done in the reverted
>> commit) on other machines. This requires us to identify Lenovo
>> machines from others. For that purpose, read machine info from DMI
>> interface, match it against all known affected machines. If there is
>> a match, choose WoWLAN suspend mode, else choose non-WoWLAN mode.
>> This is done in patches [1 - 4/6]
>>
>> For hibernation (S4), non-WoWLAN mode is chosen for all machines. The
>> unexpected wakeup issue should not happen in this mode, since WLAN
>> target power is cut off. To know if the system is going to suspend or
>> to hibernate, register a notifier such that kernel can notify us of
>> such infomation. This is done in patch [5/6]
> 
> with this, I just want to confirm, everything now works as expected
> after hibernation.

Thank you for testing.

> 
> 
> Best regards,
> Julian
> 
>>
>> The last patch bring the reverted "wifi: ath11k: restore country code
>> during resume" commit back.
>>
>> [1] https://bugzilla.kernel.org/show_bug.cgi?id=219196
>>
>> Signed-off-by: Baochen Qiang <quic_bqiang@...cinc.com>
>> ---
>> Changes in v2:
>> - fix compile warnings
>> - support hibernation on Lenovo machines listed in quirk table
>> - Link to v1:
>> https://lore.kernel.org/linux-wireless/20250320023003.65028-1-quic_bqiang@quicinc.com/
>>
>> ---
>> Baochen Qiang (6):
>>       wifi: ath11k: determine PM policy based on machine model
>>       wifi: ath11k: introduce ath11k_core_continue_suspend_resume()
>>       wifi: ath11k: refactor ath11k_core_suspend/_resume()
>>       wifi: ath11k: support non-WoWLAN mode suspend as well
>>       wifi: ath11l: choose default PM policy for hibernation
>>       Reapply "wifi: ath11k: restore country code during resume"
>>
>>  drivers/net/wireless/ath/ath11k/ahb.c  |   4 +-
>>  drivers/net/wireless/ath/ath11k/core.c | 294
>> ++++++++++++++++++++++++++++++---
>> drivers/net/wireless/ath/ath11k/core.h |  16 ++
>> drivers/net/wireless/ath/ath11k/hif.h  |  14 +-
>> drivers/net/wireless/ath/ath11k/mhi.c  |  14 +-
>> drivers/net/wireless/ath/ath11k/mhi.h  |   5 +-
>> drivers/net/wireless/ath/ath11k/pci.c  |  45 ++++-
>> drivers/net/wireless/ath/ath11k/qmi.c  |   4 +- 8 files changed, 350
>> insertions(+), 46 deletions(-) ---
>> base-commit: b6f473c96421b8b451a8df8ccb620bcd71d4b3f4
>> change-id: 20250324-ath11k-bring-hibernation-back-e11ad8e82adf
>>
>> Best regards,
> 
> 
>