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[(39.156.73.13)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 850007511; Sat, 12 Oct 2024 17:46:48 +0800 From: Duan Chenghao To: stern@rowland.harvard.edu, gregkh@linuxfoundation.org, rafael@kernel.org, pavel@ucw.cz, len.brown@intel.com, linux-usb@vger.kernel.org, linux-pm@vger.kernel.org Cc: duanchenghao@kylinos.cn, linux-kernel@vger.kernel.org, niko.mauno@vaisala.com, stanley_chang@realtek.com, tj@kernel.org, xiehongyu1@kylinos.cn, xy521521@gmail.com Subject: [PATCH v3] USB: Fix the issue of task recovery failure caused by USB status when S4 wakes up Date: Sat, 12 Oct 2024 17:46:33 +0800 Message-Id: <20241012094633.126736-1-duanchenghao@kylinos.cn> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 mse= cs ...... [ 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 loade= d. 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. Co-authored-by: Alan Stern Signed-off-by: Duan Chenghao --- drivers/usb/core/hcd-pci.c | 14 ++++++++++++-- include/linux/pm.h | 3 ++- 2 files changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index a08f3f228e6d..2c7d4446b82e 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -422,7 +422,12 @@ static int suspend_common(struct device *dev, pm_messa= ge_t msg) bool do_wakeup; int retval; =20 - do_wakeup =3D PMSG_IS_AUTO(msg) ? true : device_may_wakeup(dev); + if (PMSG_IS_AUTO(msg)) + do_wakeup =3D true; + else if (PMSG_NO_WAKEUP(msg)) + do_wakeup =3D false; + else + do_wakeup =3D device_may_wakeup(dev); =20 /* Root hub suspend should have stopped all downstream traffic, * and all bus master traffic. And done so for both the interface @@ -521,6 +526,11 @@ static int hcd_pci_suspend(struct device *dev) return suspend_common(dev, PMSG_SUSPEND); } =20 +static int hcd_pci_freeze(struct device *dev) +{ + return suspend_common(dev, PMSG_FREEZE); +} + static int hcd_pci_suspend_noirq(struct device *dev) { struct pci_dev *pci_dev =3D to_pci_dev(dev); @@ -624,7 +634,7 @@ const struct dev_pm_ops usb_hcd_pci_pm_ops =3D { .suspend_noirq =3D hcd_pci_suspend_noirq, .resume_noirq =3D hcd_pci_resume_noirq, .resume =3D hcd_pci_resume, - .freeze =3D hcd_pci_suspend, + .freeze =3D hcd_pci_freeze, .freeze_noirq =3D check_root_hub_suspended, .thaw_noirq =3D NULL, .thaw =3D hcd_pci_resume, diff --git a/include/linux/pm.h b/include/linux/pm.h index 97b0e23363c8..0dd7f559188b 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -570,7 +570,8 @@ const struct dev_pm_ops name =3D { \ { .event =3D PM_EVENT_AUTO_RESUME, }) =20 #define PMSG_IS_AUTO(msg) (((msg).event & PM_EVENT_AUTO) !=3D 0) - +#define PMSG_NO_WAKEUP(msg) (((msg.event) & \ + (PM_EVENT_FREEZE | PM_EVENT_QUIESCE)) !=3D 0) /* * Device run-time power management status. * --=20 2.34.1