On 4.5.2020 13.02, Kai-Heng Feng wrote: > > >> On May 4, 2020, at 17:47, Oliver Neukum <oneu...@suse.com> wrote: >> >> Am Montag, den 04.05.2020, 17:19 +0800 schrieb Kai-Heng Feng: >>> Etron EJ168 USB 3.0 Host Controller stops working after S3, if it was >>> runtime suspended previously: >>> [ 370.080359] pci 0000:02:00.0: can't change power state from D3cold to D0 >>> (config space inaccessible) >> >> Apparently this controller has issues with D3cold >> >>> [ 370.080477] xhci_hcd 0000:04:00.0: can't change power state from D3cold >>> to D0 (config space inaccessible) >>> [ 370.080532] pcieport 0000:00:1c.0: DPC: containment event, status:0x1f05 >>> source:0x0200 >>> [ 370.080533] pcieport 0000:00:1c.0: DPC: ERR_FATAL detected >>> [ 370.080536] xhci_hcd 0000:04:00.0: can't change power state from D3hot >>> to D0 (config space inaccessible) >>> [ 370.080552] xhci_hcd 0000:04:00.0: AER: can't recover (no error_detected >>> callback) >>> [ 370.080566] usb usb3: root hub lost power or was reset >>> [ 370.080566] usb usb4: root hub lost power or was reset >>> [ 370.080572] xhci_hcd 0000:04:00.0: Host halt failed, -19 >>> [ 370.080574] xhci_hcd 0000:04:00.0: Host not accessible, reset failed. >>> [ 370.080575] xhci_hcd 0000:04:00.0: PCI post-resume error -19! >>> [ 370.080586] xhci_hcd 0000:04:00.0: HC died; cleaning up >>> >>> This can be fixed by not runtime suspend the controller at all. >>> >>> So instead of conditionally runtime suspend the controller, always >>> prevent runtime suspend with XHCI_RESET_ON_RESUME quirk. >> >> What does that do to other controllers that can do runtime suspend >> under the current scheme? > > Ok, I'll add a new quirk specific to this controller. > > Kai-Heng
Host shouldn't runtime suspend by default unless set by userspace, or it has XHCI_DEFAULT_PM_RUNTIME_ALLOW quirk set. -Mathias
