Testcase USB Transfer Type Isochronous

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Setup

1. A Fedora17 machine is powered on
1. Attach a USB webcam
1. System should recognize this USB device

How to test

1. Run lsusb to determin the USB webcam <bus-id>
1. mount -t debugfs none /sys/kernel/debug
1. cat /sys/kernel/debug/usb/usbmon/<bus-id>u

Expected Results

1. Traffic show isochronous transfer

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