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firewire: allocate broadcast channel in hardware

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On OHCI 1.1 controllers, let the hardware allocate the broadcast channel
automatically.  This removes a theoretical race condition directly after
a bus reset where it could be possible to read the channel allocation
register with channel 31 still being unallocated.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch
2010-06-10 08:40:49 +02:00
parent 7e0e314f19
commit e91b2787d0
4 changed files with 26 additions and 12 deletions
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1
drivers/firewire/core.h
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@ -39,6 +39,7 @@ struct fw_packet;
#define BROADCAST_CHANNEL_VALID (1 << 30)
#define FEATURE_PRIORITY_BUDGET 0x01
#define FEATURE_CHANNEL_31_ALLOCATED 0x02
#define CSR_STATE_BIT_CMSTR (1 << 8)
#define CSR_STATE_BIT_ABDICATE (1 << 10)