ALSA: emu10k1: make sure synth DMA pages are allocated with DMA functions

Browse source

Commit a5003fc041 ("[ALSA] emu10k1 - simplify page allocation for synth")
switched from using the DMA allocator for synth DMA pages to manually
calling alloc_page().
However, this usage has an implicit assumption that the DMA address space
for the emu10k1-family chip is the same as the CPU physical address space
which is not true for a system with a IOMMU.

Since this made the synth part of the driver non-functional on such systems
let's effectively revert that commit (while keeping the
__synth_free_pages() simplification).

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

...

This commit is contained in:

Maciej S. Szmigiero 2018-02-14 00:06:34 +01:00 • committed by Takashi Iwai

parent 541b9bad16

commit 055e0ae10f

1 changed files with 27 additions and 17 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

44

sound/pci/emu10k1/memory.c

View file