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ALSA: firewire-lib: allocate DMA buffer separately

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For correct cache coherency on some architectures, DMA buffers must be
allocated in a different cache line than data that is concurrently used
by the CPU.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clemens Ladisch
2011-03-15 07:55:50 +01:00
committed by Takashi Iwai
parent be45436632
commit 5b2599a07e
3 changed files with 16 additions and 5 deletions
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5
sound/firewire/cmp.c
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@@ -117,9 +117,12 @@ int cmp_connection_init(struct cmp_connection *c,
if (ipcr_index >= (impr & IMPR_PLUGS_MASK))
return -EINVAL;
err = fw_iso_resources_init(&c->resources, unit);
if (err < 0)
return err;
c->connected = false;
mutex_init(&c->mutex);
fw_iso_resources_init(&c->resources, unit);
c->last_pcr_value = cpu_to_be32(0x80000000);
c->pcr_index = ipcr_index;
c->max_speed = (impr & IMPR_SPEED_MASK) >> IMPR_SPEED_SHIFT;