high-speed bus on OMAP w/o TT?

high-speed bus on OMAP w/o TT?

[Michael Jones]

Hi all,

My OMAP37 board started choking on my USB mouse when I updated from
2.6.37 to 2.6.38rc5.  I've tracked it down to commit
d199c96d41d80a567493e12b8e96ea056a1350c1, "USB: prevent buggy hubs from
crashing the USB stack."  If I revert this commit, my mouse works again.
Otherwise, I get the message:

usb 1-1: new low speed USB device using musb-hdrc and address 33
usb 1-1: parent hub has no TT

repeatedly (with 'address' incrementing).

I'm using the musb-hdrc driver for the OTG USB port in host mode.

some relevant config:
CONFIG_USB_EHCI_HCD_OMAP=y
CONFIG_USB_MUSB_HDRC=y
CONFIG_USB_MUSB_OMAP2PLUS=y
CONFIG_USB_MUSB_HOST=y
CONFIG_USB_MUSB_HDRC_HCD=y
CONFIG_USB_INVENTRA_DMA=y

# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Any thoughts on how to get around this besides just reverting the
commit?  Did anybody already encounter this?

thanks,
Michael

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