linux-kernel - Re: [PATCH v4] USB: Fix the issue of task recovery failure caused by USB status when S4 wakes up

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Message-ID: <2024102432-conjoined-skylight-33f1@gregkh>
Date: Thu, 24 Oct 2024 09:05:57 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Duan Chenghao <duanchenghao@...inos.cn>
Cc: stern@...land.harvard.edu, saranya.gopal@...el.com,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-usb@...r.kernel.org, niko.mauno@...sala.com, pavel@....cz,
	rafael@...nel.org, stanley_chang@...ltek.com, tj@...nel.org,
	xiehongyu1@...inos.cn, xy521521@...il.com,
	kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v4] USB: Fix the issue of task recovery failure caused by
 USB status when S4 wakes up

On Thu, Oct 24, 2024 at 10:40:38AM +0800, Duan Chenghao wrote:
> When a device is inserted into the USB port and an S4 wakeup is initiated,
> after the USB-hub initialization is completed, it will automatically enter
> suspend mode. Upon detecting a device on the USB port, it will proceed with
> resume and set the hcd to the HCD_FLAG_WAKEUP_PENDING state. During the S4
> wakeup process, peripherals are put into suspend mode, followed by task
> recovery. However, upon detecting that the hcd is in the
> HCD_FLAG_WAKEUP_PENDING state, it will return an EBUSY status, causing the
> S4 suspend to fail and subsequent task recovery to not proceed.
> -
> [   27.594598][ 1]  PM: pci_pm_freeze(): hcd_pci_suspend+0x0/0x28 returns -16
> [   27.594601][ 1]  PM: dpm_run_callback(): pci_pm_freeze+0x0/0x100 returns -16
> [   27.603420][ 1]  ehci-pci 0000:00:04.1: pci_pm_freeze+0x0/0x100 returned 0 after 3 usecs
> [   27.612233][ 1]  ehci-pci 0000:00:05.1: pci_pm_freeze+0x0/0x100 returned -16 after 17223 usecs
> [   27.810067][ 1]  PM: Device 0000:00:05.1 failed to quiesce async: error -16
> [   27.816988][ 1]  PM: quiesce of devices aborted after 1833.282 msecs
> [   27.823302][ 1]  PM: start quiesce of devices aborted after 1839.975 msecs
> ......
> [   31.303172][ 1]  PM: recover of devices complete after 3473.039 msecs
> [   31.309818][ 1]  PM: Failed to load hibernation image, recovering.
> [   31.348188][ 1]  PM: Basic memory bitmaps freed
> [   31.352686][ 1]  OOM killer enabled.
> [   31.356232][ 1]  Restarting tasks ... done.
> [   31.360609][ 1]  PM: resume from hibernation failed (0)
> [   31.365800][ 1]  PM: Hibernation image not present or could not be loaded.
> 
> The "do_wakeup" is determined based on whether the controller's
> power/wakeup attribute is set. The current issue necessitates considering
> the type of suspend that is occurring. If the suspend type is either
> PM_EVENT_FREEZE or PM_EVENT_QUIESCE, then "do_wakeup" should be set to
> false.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202410151722.rfjtknRz-lkp@intel.com/
> Signed-off-by: Alan Stern <stern@...land.harvard.edu>
> Signed-off-by: Duan Chenghao <duanchenghao@...inos.cn>

What commit id does this fix?

And I missed where Alan provided a signed-off-by, where was that?

thanks,

greg k-h