Do a dummy read to flush the interrupt ACK that we just performed, ensuring that everything is really, truly consistent.
Do a dummy read to flush the interrupt ACK that we just performed,
ensuring that everything is really, truly consistent.

This fixes certain cases where one will see various:

mfi0: COMMAND 0xffffffXXXXXXXXXX TIMEOUT AFTER XX SECONDS

MFC after:	3 days
Submitted by:	scottl
Ok'ed by:	jhb

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