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f30e6d3e41
linux/sound
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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
..
aoa Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
arm Merge branch 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound-2.6 into for-2.6.39 2011-04-03 19:28:29 +09:00
atmel
core Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
drivers Fix common misspellings 2011-03-31 11:26:23 -03:00
firewire firewire: octlet AT payloads can be stack-allocated 2011-05-10 22:53:44 +02:00
i2c
isa Fix common misspellings 2011-03-31 11:26:23 -03:00
mips
oss Fix common misspellings 2011-03-31 11:26:23 -03:00
parisc
pci ALSA: hda - Fix Realtek's chained fixup checks 2011-05-02 13:55:36 +02:00
pcmcia
ppc Fix common misspellings 2011-03-31 11:26:23 -03:00
sh
soc ASoC: Fix CODEC DAI names for Goni 2011-04-28 12:09:53 +01:00
sparc
spi
synth
usb ALSA: usb-audio - Terratec Aureon 7.1 USB ID as C-Media cm6206 quirks 2011-04-28 18:22:41 +02:00
ac97_bus.c
Kconfig ALSA: add LaCie FireWire Speakers/Griffin FireWave Surround driver 2011-03-15 08:42:22 +01:00
last.c
Makefile ALSA: add LaCie FireWire Speakers/Griffin FireWave Surround driver 2011-03-15 08:42:22 +01:00
sound_core.c sound: Use sound_register_*() for additional OSS minor devices 2011-03-09 20:10:37 +01:00
sound_firmware.c sound: read i_size with i_size_read() 2011-03-18 15:14:57 +01:00