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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 /drivers/firewire/core.h | |
| parent | 0c53decdd0a9f9c459ccabe0b5f79660bde5375b (diff) | |
| download | linux-stable-6fdc03709433ccc2005f0f593ae9d9dd04f7b485.tar.gz linux-stable-6fdc03709433ccc2005f0f593ae9d9dd04f7b485.tar.bz2 linux-stable-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 'drivers/firewire/core.h')
| -rw-r--r-- | drivers/firewire/core.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h index c3cfc647e5e3..6052816be353 100644 --- a/drivers/firewire/core.h +++ b/drivers/firewire/core.h @@ -120,7 +120,8 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event); int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma); void fw_iso_resource_manage(struct fw_card *card, int generation, - u64 channels_mask, int *channel, int *bandwidth, bool allocate); + u64 channels_mask, int *channel, int *bandwidth, + bool allocate, __be32 buffer[2]); /* -topology */ |