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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-06-20 13:23:59 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-06-25 19:42:36 +0200 |
| commit | 6fdc03709433ccc2005f0f593ae9d9dd04f7b485 (patch) | |
| tree | e42e7304084b1b6420d456fbd2a5622e93327a74 /include/linux/firewire.h | |
| parent | 0c53decdd0a9f9c459ccabe0b5f79660bde5375b (diff) | |
| download | lwn-6fdc03709433ccc2005f0f593ae9d9dd04f7b485.tar.gz lwn-6fdc03709433ccc2005f0f593ae9d9dd04f7b485.zip | |
firewire: core: do not DMA-map stack addresses
The DMA mapping API cannot map on-stack addresses, as explained in
Documentation/DMA-mapping.txt. Convert the two cases of on-stack packet
payload buffers in firewire-core (payload of lock requests in the bus
manager work and in iso resource management) to slab-allocated memory.
There are a number on-stack buffers for quadlet write or quadlet read
requests in firewire-core and firewire-sbp2. These are harmless; they
are copied to/ from card driver internal DMA buffers since quadlet
payloads are inlined with packet headers.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'include/linux/firewire.h')
| -rw-r--r-- | include/linux/firewire.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/firewire.h b/include/linux/firewire.h index 9823946adbc5..192d1e43c43c 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -127,6 +127,7 @@ struct fw_card { struct delayed_work work; int bm_retries; int bm_generation; + __be32 bm_transaction_data[2]; bool broadcast_channel_allocated; u32 broadcast_channel; |