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eab8e4e461
ALSA OXFW driver uses AV/C Audio Subunit commands to control some models. The commands get/set the state of Feature function block of the subunit. The commands are not specific to OXFW, thus there's a possibility to use them in the other drivers. Currently, helper functions for the commands require 'struct snd_oxfw', although, it's not necessarily required. It's better to change prototype of the functions without the structure for future use. This commit changes the prototype. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>