umass problem with xhci (USB 3)

[Paul Goyette <paul%whooppee.com@localhost>]

With a kernel built from sources dated 2016-05-29 at 23:57:35 UTC, when 
attaching my external hard drive (near-line backup device), I get the 
following messages:

uhub0 at usb0: vendor 8086 xHCI Root Hub, class 9/0, rev 1.00/1.00, addr 0
...
Jun  4 08:21:37 pokey /netbsd: umass0 at uhub0 port 2 configuration 1 interface 0
Jun  4 08:21:37 pokey /netbsd: umass0: Western Digital Ext HDD 1021, rev 2.00/20.02, addr 24
Jun  4 08:21:37 pokey /netbsd: umass0: using SCSI over Bulk-Only
Jun  4 08:21:37 pokey /netbsd: umass0: failed to create xfers

Interestingly, even though this motherboard has both USB2 and USB3 
ports, and dmesg includes

uhub1 at usb1: vendor 8086 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
...
uhub2 at uhub1 port 1: vendor 8087 product 8000, class 9/0, rev 2.00/0.05, addr2

but every device I plug in, regardless of USB connector, gets attached 
to uhub0 (the one for xHCI)!  So I cannot get the external drive to work 
by connecting to a USB2 port.

Any suggestions?





+------------------+--------------------------+------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:      |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org |
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