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usb: Initialize hcd->state roothubs.
We would like to allow host controller drivers to stop using hcd->state. Unfortunately, some host controller drivers use hcd->state as an implicit way of telling the core that a controller has died. The roothub registration functions must assume the host died if hcd->state equals HC_STATE_HALT. To facilitate drivers that don't want to set hcd->state to HC_STATE_RUNNING in their initialization routines, we set the state to running before calling the host controller's start function. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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