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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-20 15:23:59 +0400
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-25 21:42:36 +0400
commit6fdc03709433ccc2005f0f593ae9d9dd04f7b485 (patch)
treee42e7304084b1b6420d456fbd2a5622e93327a74 /drivers/firewire/core.h
parent0c53decdd0a9f9c459ccabe0b5f79660bde5375b (diff)
downloadlinux-6fdc03709433ccc2005f0f593ae9d9dd04f7b485.tar.xz
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.h3
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 */