On Thu, 2018-02-15 at 19:29 +0000, Marc Zyngier wrote: > [+ Ard, who helped me chasing the initial issue] > > On 15/02/18 06:43, Bockholdt Arne wrote: > > Hi all, > > > > on our Intel Atom C2578 server with a SuperMicro A1SAi board and a > > Renesas uPD720201 USB 3.0 host controller the controller has > > stopped > > working since kernel 4.13.x. Before that kernel the dmesg messages > > from > > XHCI were: > > > > dmesg-4.12.1-serverv4.log:xhci_hcd 0000:03:00.0: xHCI Host > > Controller > > dmesg-4.12.1-serverv4.log:xhci_hcd 0000:03:00.0: new USB bus > > registered, > > assigned bus number 2 > > dmesg-4.12.1-serverv4.log:xhci_hcd 0000:03:00.0: hcc params > > 0x014051cf > > hci version 0x100 quirks 0x00000010 > > dmesg-4.12.1-serverv4.log:usb usb2: Manufacturer: Linux 4.12.1- > > serverv4 > > xhci-hcd > > dmesg-4.12.1-serverv4.log:xhci_hcd 0000:03:00.0: xHCI Host > > Controller > > dmesg-4.12.1-serverv4.log:xhci_hcd 0000:03:00.0: new USB bus > > registered, > > assigned bus number 3 > > dmesg-4.12.1-serverv4.log:usb usb3: Manufacturer: Linux 4.12.1- > > serverv4 > > xhci-hcd > > > > After that the message look like that: > > > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: Resetting > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: Refused to change > > power > > state, currently in D3 > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: xHCI Host > > Controller > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: new USB bus > > registered, > > assigned bus number 2 > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: Host halt failed, > > -19 > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: can't setup: -19 > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: USB bus 2 > > deregistered > > dmesg-4.13.1-serverv4.log:xhci_hcd 0000:03:00.0: init 0000:03:00.0 > > fail, -19 > > > > I've tested it with 4.15.3 too, it's still the same. I've narrowed > > it > > down to the following patch: > > > > commit 8466489ef5ba48272ba4fa4ea9f8f403306de4c7 > > Author: Marc Zyngier <marc.zyngier@xxxxxxx <mailto:marc.zyngier@arm > > .com>> > > Date: Tue Aug 1 20:11:08 2017 -0500 > > > > xhci: Reset Renesas uPD72020x USB controller for 32-bit DMA > > issue > > > > Reverting the patch on top of 4.15.3 restores the USB3 > > functionality on > > our server. Please let me know if there is anything I can do to fix > > the > > problem. Thank you. > > Hi Arne, > > This looks pretty bad. I suspect that once reset, the firmware is > lost. > I'll try to write a patch dumping some information about it. > > Ard: Do you know if the Cello board has a SPI flash connected to the > Renesas chip, from which it would load the firmware? > > Another possibility is that power management kicks in, and that the > endpoint is stuck there. Could also be firmware related, but not > only. > I'd welcome any idea on the subject, as I cannot reproduce this issue > on > the HW I have. > > It we cannot work out what exactly is causing this, we may have to > default to not resetting the part and rely on a command-line option > to > do it... I can't say I'm a fan. > > Thanks, > > M. > Hi Marc, I've tested it with 4.15.7 and it's still there. Is there anything that I can do to help fixing this problem? Thank you, Arne ��.n��������+%������w��{.n�����{���)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
