WaitForDoorbellInt — Wait for IOC to set its doorbell interrupt bit
Pointer to MPT_ADAPTER structure
How long to wait (in seconds)
Specifies whether the process can sleep
This routine waits (up to ~2 seconds max) for IOC doorbell interrupt (MPI_HIS_DOORBELL_INTERRUPT) to be set in the IntStatus register.
Returns a negative value on failure, else wait loop count.