tree 813a25088e68dc734966ce5ed4aacada01084996
parent 099d54143e49d49c33cd25779ca725191df59b73
author Stefan Richter <stefanr@s5r6.in-berlin.de> 1244584615 +0200
committer Stefan Richter <stefanr@s5r6.in-berlin.de> 1244973426 +0200

firewire: core: don't update Broadcast_Channel if RFC 2734 conditions aren't met

This extra check will avoid Broadcast_Channel register related traffic
to many IIDC, SBP-2, and AV/C devices which aren't IRMC or have a
max_rec < 8 (i.e. support < 512 bytes async payload).  This avoids a
little bit of traffic after bus reset and is even more careful with
devices which don't implement this CSR.

The assumption is that no other protocol than IP over 1394 uses the
broadcast channel for streams.

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