tree 76c4c28d674d33c924f638cde404bfafede88e15
parent f07d42ac7f2a7d650125d0cd7a79631c4522edaf
author Clemens Ladisch <clemens@ladisch.de> 1337880559 +0200
committer Stefan Richter <stefanr@s5r6.in-berlin.de> 1338114671 +0200

firewire: ohci: lazy bus time initialization

The Bus_Time CSR is virtually never used, so we can avoid burning CPU in
interrupt context for 1 or 3 IsochronousCycleTimer accesses every minute
by not tracking the bus time until the CSR is actually accessed for the
first time.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>