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usb-ehci: trace state machine changes
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Add functions to get and set the current state of the state machine,
add tracepoints there to trace state transitions.  Add support for
traceing the queue heads and transfer descriptors as we look at them.

Drop a few DPRINTFs and all DPRINTF_ST lines, they are obsolete now.

No change in behavior.

Signed-off-by: Gerd Hoffmann <[email protected]>
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@kraxel
kraxel committed Jun 14, 2011
1 parent 439a97c commit 26d5397
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