Hi, guys. Recently, I was testing usb3 staff, and met some problem. I got a usb3 disk attaching to a usb3 hub, and that usb3 hub attached to usb3 root hub. So the topology is usb3 root hub -> usb3 hub -> usb3 storage device. # lsusb.py -i [snip] usb8 1d6b:0002 09 2.00 480MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub 8-2 2109:3431 09 2.00 480MBit/s 100mA 1IFs () hub usb9 1d6b:0003 09 3.005000MBit/s 0mA 1IFs (xhci_hcd 0000:02:00.0) hub 9-2 2109:0810 09 3.005000MBit/s 2mA 1IFs (VIA Labs, Inc. 4-Port USB 3.0 Hub) hub 9-2.2 1058:1123 00 3.005000MBit/s 2mA 1IFs (Western Digital My Book 3.0 574341545230383135353130) 9-2.2:1.0 (IF) 08:06:50 2EPs (Mass Storage:SCSI:Bulk (Zip)) usb-storage host11 (sdb) And after times of directly plugging in and out the usb3 hub rapidly (with usb3 disk attached), xhci driver died. I tried different usb root hub vendors, and different usb3 device, same thing happens. # dmesg [snip] *(here we plug out usb3 hub)* usb 9-2: USB disconnect, address 2 usb 9-2.2: USB disconnect, address 5 xhci_hcd 0000:02:00.0: WARN: transfer error on endpoint xhci_hcd 0000:02:00.0: WARN: transfer error on endpoint usb 8-2: USB disconnect, address 2 *(here we plug in usb3 hub)* usb 8-2: new high speed USB device using xhci_hcd and address 21 xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep usb 8-2: New USB device found, idVendor=2109, idProduct=3431 usb 8-2: New USB device strings: Mfr=0, Product=1, SerialNumber=0 usb 8-2: Product: USB2.0 Hub usb 8-2: configuration #1 chosen from 1 choice hub 8-2:1.0: USB hub found xhci_hcd 0000:02:00.0: WARN: short transfer on control ep hub 8-2:1.0: 4 ports detected usb 9-2: new SuperSpeed USB device using xhci_hcd and address 6 xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep usb 9-2: New USB device found, idVendor=2109, idProduct=0810 usb 9-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 9-2: Product: 4-Port USB 3.0 Hub usb 9-2: Manufacturer: VIA Labs, Inc. usb 9-2: configuration #1 chosen from 1 choice hub 9-2:1.0: USB hub found hub 9-2:1.0: 4 ports detected xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: WARN: short transfer on control ep xhci_hcd 0000:02:00.0: Timeout while waiting for a slot xhci_hcd 0000:02:00.0: Timeout while waiting for a slot xhci_hcd 0000:02:00.0: Timeout while waiting for a slot xhci_hcd 0000:02:00.0: Timeout while waiting for a slot xhci_hcd 0000:02:00.0: Timeout while waiting for a slot hub 9-2:1.0: couldn't allocate port 2 usb_device xhci_hcd 0000:02:00.0: xHCI host not responding to stop endpoint command. xhci_hcd 0000:02:00.0: Assuming host is dying, halting host. xhci_hcd 0000:02:00.0: HC died; cleaning up usb 8-2: USB disconnect, address 21 usb 9-1: USB disconnect, address 3 usb 9-2: USB disconnect, address 6 but I think this should be a bug.Do you guys meet with this issue? Any comments will be appreciate. ps.I'm not familiar with xhci driver code, but I will try my best to help test it. :) -- Thanks, Wang Chao -- 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
