ALSA: usb-audio - Cache mixer values

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Cache mixer values in usb-audio driver to reduce too excessive
accesses to the hardware.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Takashi Iwai 2009-01-15 17:05:24 +01:00

parent 37a76bd4f1

commit 641b487944

1 changed files with 70 additions and 52 deletions

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122

sound/usb/usbmixer.c

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