Bug 735263

Summary:	USB3 device can't be detected on USB2 hub
Product:	Red Hat Enterprise Linux 6	Reporter:	WANG Chao <chaowang>
Component:	kernel	Assignee:	Don Zickus <dzickus>
Status:	CLOSED ERRATA	QA Contact:	WANG Chao <chaowang>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.2	CC:	arozansk, chaowang, czhang, ruyang
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-2.6.32-206.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-12-06 14:28:11 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description WANG Chao 2011-09-02 03:33:09 UTC

Description of problem:
1st step:
Plug USB3 hub into USB3 root hub
# lsusb.py -u
...
usb8            1d6b:0002 09  2.00 480MBit/s   0mA 1IFs (xhci_hcd 0000:02:00.0) hub
usb9            1d6b:0003 09  3.005000MBit/s   0mA 1IFs (xhci_hcd 0000:02:00.0) hub

2nd step:
Plug USB2 hub into that USB3 hub.
# lsusb.py -u
...
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

3nd step:
Attach a USB3 device to that USB2 hub.
# lsusb.py -u
...
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

USB3 device wasn't been detected.

Split dmesg:
--- 1st Step ---
usb 8-2: new high speed USB device using xhci_hcd and address 2
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 2
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
--- 2nd Step ---
usb 8-2.1: new high speed USB device using xhci_hcd and address 3
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 8-2.1: New USB device found, idVendor=05e3, idProduct=0608
usb 8-2.1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
usb 8-2.1: Product: USB2.0 Hub
usb 8-2.1: configuration #1 chosen from 1 choice
hub 8-2.1:1.0: USB hub found
xhci_hcd 0000:02:00.0: WARN: short transfer on control ep
hub 8-2.1:1.0: 4 ports detected
--- 3rd Step ---
(Nothing more shows up)

Version-Release number of selected component (if applicable):
2.6.32-191.el6.x86_64

How reproducible:
Not every time

Steps to Reproduce:
1.as description
2.
3.
  
Actual results:
USB3 device wasn't detected

Expected results:
USB3 should work fine.

Additional info:
Final topology is USB3 root hub -> USB3 hub -> USB2 hub -> USB3 device
USB3 root hub is a TI PCI-E card

Comment 2 WANG Chao 2011-09-02 04:24:56 UTC

Change topology to 3 host port -> 2 hub -> 3 device
Works correctly as expect, no this issue found.

Comment 4 RHEL Program Management 2011-09-27 13:01:16 UTC

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Comment 5 Aristeu Rozanski 2011-10-05 15:33:23 UTC

Patch(es) available on kernel-2.6.32-206.el6

Comment 10 errata-xmlrpc 2011-12-06 14:28:11 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1530.html