ALSA: fireface: postpone sound card registration

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Just after appearing on IEEE 1394 bus, this unit generates several bus
resets. This is due to loading firmware from on-board flash memory and
initialize hardware. It's better to postpone sound card registration.

This commit schedules workqueue to process actual probe processing
2 seconds after the last bus-reset. The card instance is kept at unit
probe callback and released at card free callback. Therefore, when the
actual probe processing fails, the memory block is wasted. This is due to
simplify driver implementation.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Takashi Sakamoto 2017-03-31 22:06:00 +09:00 • committed by Takashi Iwai

parent 17c4e5eadc

commit 324540c4e0

2 changed files with 67 additions and 22 deletions

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84

sound/firewire/fireface/ff.c

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5

sound/firewire/fireface/ff.h

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