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f30e6d3e41
linux/drivers/firewire
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Stefan Richter f30e6d3e41 firewire: octlet AT payloads can be stack-allocated 
We do not need slab allocations anymore in order to satisfy
streaming DMA mapping constraints, thanks to commit da28947e7e
"firewire: ohci: avoid separate DMA mapping for small AT payloads".

(Besides, the slab-allocated buffers that firewire-core, firewire-sbp2,
and firedtv used to provide for 8-byte write and lock requests were
still not fully portable since they crossed cacheline boundaries or
shared a cacheline with unrelated CPU-accessed data.  snd-firewire-lib
got this aspect right by using an extra kmalloc/ kfree just for the
8-byte transaction buffer.)

This change replaces kmalloc'ed lock transaction scratch buffers in
firewire-core, firedtv, and snd-firewire-lib by local stack allocations.
Perhaps the most notable result of the change is simpler locking because
there is no need to serialize usages of preallocated per-device buffers
anymore.  Also, allocations and deallocations are simpler.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
2011-05-10 22:53:44 +02:00
..
core-card.c firewire: octlet AT payloads can be stack-allocated 2011-05-10 22:53:44 +02:00
core-cdev.c firewire: octlet AT payloads can be stack-allocated 2011-05-10 22:53:44 +02:00
core-device.c firewire: core: ignore link-active bit of new nodes, fix device recognition 2011-03-20 16:45:25 +01:00
core-iso.c firewire: octlet AT payloads can be stack-allocated 2011-05-10 22:53:44 +02:00
core-topology.c firewire: core: fix card->reset_jiffies overflow 2011-01-23 12:31:01 +01:00
core-transaction.c firewire: octlet AT payloads can be stack-allocated 2011-05-10 22:53:44 +02:00
core.h ALSA: add LaCie FireWire Speakers/Griffin FireWave Surround driver 2011-03-15 08:42:22 +01:00
init_ohci1394_dma.c ieee1394: move init_ohci1394_dma to drivers/firewire/ 2010-10-11 14:48:03 +02:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-03-21 10:05:22 -07:00
Makefile ieee1394: move init_ohci1394_dma to drivers/firewire/ 2010-10-11 14:48:03 +02:00
net.c Fix common misspellings 2011-03-31 11:26:23 -03:00
nosy-user.h
nosy.c firewire: nosy: char device is not seekable 2010-12-12 15:47:02 +01:00
nosy.h
ohci.c Merge tag 'v2.6.39-rc7' 2011-05-10 22:50:41 +02:00
ohci.h firewire: ohci: fix TI TSB82AA2 regression since 2.6.35 2010-10-17 14:09:12 +02:00
sbp2.c firewire: sbp2: revert obsolete 'fix stall with "Unsolicited response"' 2011-03-20 16:45:24 +01:00