usb broken on reboot on xu4

[floion]

At every few reboots usb is broken on xu4 (direct consequence is that eth is no longer available)

This was observed on 2.45.1+rev1 but may be happening in older versions

[ 4.477033] hub 3-1:1.0: USB hub found
[ 4.479736] hub 3-1:1.0: 2 ports detected
[ 5.862821] dma-pl330 3880000.adma: Loaded driver for PL330 DMAC-241330
[ 5.868000] dma-pl330 3880000.adma: DBUFF-4x8bytes Num_Chans-6 Num_Peri-16 Num_Events-6
[ 5.898165] dma-pl330 3880000.adma: PM domain MAU will not be powered off
[ 10.168152] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 15.448138] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 15.668116] usb 6-1: device not accepting address 2, error -62
[ 20.968142] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 26.248138] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 26.468114] usb 6-1: device not accepting address 3, error -62
[ 26.508307] usb usb6-port1: attempt power cycle
[ 32.088140] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 37.368138] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 37.588084] usb 6-1: device not accepting address 4, error -62
[ 42.888136] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 48.168136] xhci-hcd xhci-hcd.6.auto: Timeout while waiting for setup device command
[ 48.388095] usb 6-1: device not accepting address 5, error -62
[ 48.428299] usb usb6-port1: unable to enumerate USB device
[ 48.472397] usb usb6-port1: config error
[ 48.551931] CP437: Invalid argument