Yinghai Lu wrote: > On Fri, Apr 20, 2012 at 5:09 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote: >>> What do you mean "strange power state"? The only PCI power states the >>> xHCI driver will use is D0 or D3hot. D3hot is entered automatically by >>> the USB core runtime PM system when all USB devices are disconnected or >>> suspended. So what strange power state are we talking about? >> >> that's helpful. Can that feature to be disabled? > > please check and set > /sys/bus/pci/devices/0000:11:00.0/power/control > /sys/bus/pci/devices/0000:11:00.0/usb?/power/control > from auto to on I inserted the card, it was detected: [33335.295737] pci 0000:11:00.0: [1033:0194] type 00 class 0x0c0330 [33335.295789] pci 0000:11:00.0: reg 10: [mem 0x00000000-0x00001fff 64bit] [33335.296043] pci 0000:11:00.0: PME# supported from D0 D3hot [33335.315688] pci 0000:11:00.0: BAR 0: assigned [mem 0xf6c00000-0xf6c01fff 64bit] [33335.315796] xhci_hcd 0000:11:00.0: enabling device (0100 -> 0102) [33335.315893] xhci_hcd 0000:11:00.0: xHCI Host Controller [33335.315897] xhci_hcd 0000:11:00.0: new USB bus registered, assigned bus number 5 [33335.316178] xhci_hcd 0000:11:00.0: irq 19, io mem 0xf6c00000 [33335.316281] xhci_hcd 0000:11:00.0: irq 53 for MSI/MSI-X [33335.316285] xhci_hcd 0000:11:00.0: irq 54 for MSI/MSI-X [33335.316288] xhci_hcd 0000:11:00.0: irq 55 for MSI/MSI-X [33335.316292] xhci_hcd 0000:11:00.0: irq 56 for MSI/MSI-X [33335.316296] xhci_hcd 0000:11:00.0: irq 57 for MSI/MSI-X [33335.316447] usb usb5: New USB device found, idVendor=1d6b, idProduct=0002 [33335.316448] usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [33335.316450] usb usb5: Product: xHCI Host Controller [33335.316451] usb usb5: Manufacturer: Linux 3.4.0-rc3-default xhci_hcd [33335.316452] usb usb5: SerialNumber: 0000:11:00.0 [33335.316574] xHCI xhci_add_endpoint called for root hub [33335.316575] xHCI xhci_check_bandwidth called for root hub [33335.316597] hub 5-0:1.0: USB hub found [33335.316609] hub 5-0:1.0: 2 ports detected [33335.316680] xhci_hcd 0000:11:00.0: xHCI Host Controller [33335.316683] xhci_hcd 0000:11:00.0: new USB bus registered, assigned bus number 6 [33335.319424] usb usb6: New USB device found, idVendor=1d6b, idProduct=0003 [33335.319426] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [33335.319428] usb usb6: Product: xHCI Host Controller [33335.319429] usb usb6: Manufacturer: Linux 3.4.0-rc3-default xhci_hcd [33335.319430] usb usb6: SerialNumber: 0000:11:00.0 [33335.319560] xHCI xhci_add_endpoint called for root hub [33335.319562] xHCI xhci_check_bandwidth called for root hub [33335.319584] hub 6-0:1.0: USB hub found [33335.319602] hub 6-0:1.0: 2 ports detected # cat /sys/bus/pci/devices/0000:11:00.0/power/control on # cat /sys/bus/pci/devices/0000:11:00.0/usb?/power/control auto auto # echo on > /sys/bus/pci/devices/0000:11:00.0/usb5/power/control # echo on > /sys/bus/pci/devices/0000:11:00.0/usb6/power/control # I removed the card and it was NOT detected. Note: I did the test with the running instance of kernel booted WITH pcie_aspm=off. Will reboot without tha option and re-try. Martin -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
