The hw setup: NEC based controller, device directly attached to the embedded hub.
The device is reset via libusb_reset_device().
The kernel log (master is at f878133, dynamic debug enabled for xhci and usbcore), shows this:
Feb 8 16:35:33 localhost kernel: usb 9-2: reset SuperSpeed USB device using xhci_hcd and address 16
Feb 8 16:35:33 localhost kernel: xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Feb 8 16:35:33 localhost kernel: usb 9-2: config index 0, error 27
Feb 8 16:35:33 localhost kernel: usb 9-2: device firmware changed
Feb 8 16:35:33 localhost kernel: hub 9-0:1.0: logical disconnect on port 2
Feb 8 16:35:33 localhost kernel: hub 9-0:1.0: state 7 ports 4 chg 0004 evt 0000
Feb 8 16:35:33 localhost kernel: hub 9-0:1.0: port 2, status 8103, change 0000, 5.0 Gb/s
Feb 8 16:35:33 localhost kernel: usb 9-2: USB disconnect, address 16
Feb 8 16:35:33 localhost kernel: usb 9-2: unregistering device
Feb 8 16:35:33 localhost kernel: usb 9-2: unregistering interface 9-2:1.0
Feb 8 16:35:33 localhost kernel: usb 9-2: unregistering interface 9-2:1.1
Feb 8 16:35:33 localhost kernel: usb 9-2: usb_disable_device nuking all URBs
Feb 8 16:35:33 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:33 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:33 localhost kernel: usb 9-2: device not accepting address 17, error -71
Feb 8 16:35:33 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:33 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:33 localhost kernel: usb 9-2: device not accepting address 18, error -71
Feb 8 16:35:33 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:34 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:34 localhost kernel: usb 9-2: device not accepting address 19, error -71
Feb 8 16:35:34 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:34 localhost kernel: usb 9-2: Device not responding to set address.
Feb 8 16:35:34 localhost kernel: usb 9-2: device not accepting address 20, error -71
Feb 8 16:35:34 localhost kernel: hub 9-0:1.0: unable to enumerate USB device on port 2
Feb 8 16:35:36 localhost kernel: hub 9-0:1.0: hub_suspend
Feb 8 16:35:36 localhost kernel: usb usb9: bus auto-suspend
The USB bus trace shows:
0) hot reset (TS1/2)
1) SET ADDRESS to addr 0, new address 1. Now the device's got address 1.
2,3) GET DESC device...
4) GET CONFIG
5) SET ADDRESS to addr 0, new address 1. <-- problem.
In HS mode, the 2nd SET ADDRESS is not observed, unless of course
immediately after a bus reset, but not out of the blue like what's shown
above. Also the data packet shows that the "new address" is 1 and
not 18, 19, etc. as shown in the kernel log above.
Anyone seen this (observed only in SS, HS is fine)? Is there a fix for this in the trunk since f878133b?
Luben
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