Hi Mathias, On Mon, Aug 1, 2016 at 8:20 AM, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote: > > On 01.08.2016 13:15, Durval Menezes wrote: > > Hello Mike, Mathias, list, > > > > On 06.02.2016 19:08, Mike Murdoch wrote: > > Bug ID: 111251 > > > > I have a NEC uPD720200 USB3.0 controller in a Thinkpad W520 laptop on > > kernel 4.4.1-gentoo. > > > > 0e:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host > > Controller (rev 04) (prog-if 30 [XHCI]) > > Subsystem: Lenovo uPD720200 USB 3.0 Host Controller > > Flags: bus master, fast devsel, latency 0 > > Memory at f3800000 (64-bit, non-prefetchable) [size=8K] > > Capabilities: [50] Power Management version 3 > > Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+ > > Capabilities: [90] MSI-X: Enable+ Count=8 Masked- > > Capabilities: [a0] Express Endpoint, MSI 00 > > Capabilities: [100] Advanced Error Reporting > > Capabilities: [140] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff > > Capabilities: [150] Latency Tolerance Reporting > > Kernel driver in use: xhci_hcd > > Kernel modules: xhci_pci > > > > When runtime power control for this controller is disabled > > (/sys/bus/pci/devices/0000:0e:00.0/power/control = on), the controller > > works fine and reaches over 120MB/s transfer rates. > > > > When runtime power control for this controller is enabled > > (/sys/bus/pci/devices/0000:0e:00.0/power/control = auto), two effects > > can be observed: > > > > - Transfer rates are much lower at around 30MB/s > > - During transfers, the controller dies after a couple of seconds: > > > > I found this message in the list archives, and I have the exact same > > issues on exactly the same hardware (Thinkpad W520 laptop with the same > > USB3 controller showing on lspci -v); otherwise, I'm running distro kernel > > 2.6.32-573.7.1.el6.x86_64 on a Springdale Linux 6.7 (RHEL6) install. > > > > I just verified that my controller's PM was set by default to "auto": > > cat /sys/bus/pci/devices/0000\:0e\:00.0/power/control > > auto > > I have now set it to "on" and will test whether this will work around > > the issue (I'm waiting for my USB3.0 "heavy duty" disk docks to be > > released from another system that is using them right now). > > > > I have one question for Mike: have you upgraded your uPD720200 controller > > firmware (as per [1], [2]) or are you still running stock? > > > > Also, one question for Mathias: do you know whether your patches at [3] > > can be applied to kernel 2.6.32? > > The last patch in [3] is faulty. So don't use the patches from the mail. > > I just force updated that branch, so if you like you can try to backport > patches from: > > git://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git bug_usb3_enum_rtresume > > only 2 patches are relevant: > > 8caabe9 xhci: Don't suspend the xhci bus it there is a pending event. > 4427456 xhci: resume USB 3 roothub first Thanks Mathias. Now I only need Mike's response concerning the firmware in order to proceed. Cheers, -- Durval Menezes (durval AT tmp DOT com DOT br, http://www.tmp.com.br/) -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
