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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-06-20 15:23:59 +0400 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-06-25 21:42:36 +0400 |
| commit | 6fdc03709433ccc2005f0f593ae9d9dd04f7b485 (patch) | |
| tree | e42e7304084b1b6420d456fbd2a5622e93327a74 /drivers/firewire/core-cdev.c | |
| parent | 0c53decdd0a9f9c459ccabe0b5f79660bde5375b (diff) | |
| download | linux-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-cdev.c')
| -rw-r--r-- | drivers/firewire/core-cdev.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index d1d30c615b0f..ced186d7e9a9 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -125,6 +125,7 @@ struct iso_resource { int generation; u64 channels; s32 bandwidth; + __be32 transaction_data[2]; struct iso_resource_event *e_alloc, *e_dealloc; }; @@ -1049,7 +1050,8 @@ static void iso_resource_work(struct work_struct *work) r->channels, &channel, &bandwidth, todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC || - todo == ISO_RES_ALLOC_ONCE); + todo == ISO_RES_ALLOC_ONCE, + r->transaction_data); /* * Is this generation outdated already? As long as this resource sticks * in the idr, it will be scheduled again for a newer generation or at |