USB Subsystem changes from 2.6.11 to 2.6.16

Hi All,

We are currently using a customized kernel version 2.6.11.10 specific to our ARM board. We are testing our USB-OTG controller driver on our board. We found that, the latest Linux kernel version 2.6.16.11 has added some features to the USB Sub-System.

Could somebody answer the following question?

1). What are the feature differences (say for example a new power saving API was added) in the USB Sub-system from 2.6.11.10 to 2.6.16.11? Can somebody list down the feature differences or can somebody point out some Linux links where I can find the feature differences.

2). Whether there is any show stopper problem with respect to USB-Subsystem in 2.6.11.10? If there is no show stopper problem in the USB-Subsystem in 2.6.11.10, will help us in not spending our time in porting 2.6.11.10 to 2.6.16.11 just for the sake of USB-Controller driver.

3). We have lot of applications which are already running on 2.6.11.10 on the ARM board. If at all we have to port the kernel just for USB-Subsystem, then we have to port all the other applications to run on the new kernel on our board. So is it worthy to do this exercise.

Please Help!!

Regards, Kan