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authorClemens Ladisch <clemens@ladisch.de>2010-06-10 08:40:49 +0200
committerClemens Ladisch <clemens@ladisch.de>2010-06-10 08:40:49 +0200
commite91b2787d0a2e4719b016e8dec0afd2d5ab6c30f (patch)
treee76a3665243ed9fb7275228d9a14dcb0eb5b567a /drivers/firewire/core-topology.c
parent7e0e314f198d5048b74c8f0ef9f4c1c02e5ecfc9 (diff)
downloadlinaro-lsk-e91b2787d0a2e4719b016e8dec0afd2d5ab6c30f.tar.gz
firewire: allocate broadcast channel in hardware
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>
Diffstat (limited to 'drivers/firewire/core-topology.c')
-rw-r--r--drivers/firewire/core-topology.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index ca3c6531816..00a556f3a58 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -543,7 +543,8 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
spin_lock_irqsave(&card->lock, flags);
- card->broadcast_channel_allocated = false;
+ card->broadcast_channel_allocated = (card->driver->get_features(card) &
+ FEATURE_CHANNEL_31_ALLOCATED) != 0;
card->node_id = node_id;
/*
* Update node_id before generation to prevent anybody from using