ALSA: line6: variax: Rewrite complex timer & work combo with a delayed work

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Variax driver had a very complex and staged startup sequence using
multiple timers and a work.  This patch simplifies the procedure to a
single delayed work.

Now the startup stage consists of:
- VARIAX_STARTUP_VERSIONREQ:
  requesting the version and the message handler raises up to the next
  stage upon receiving the reply.  The request is repeated until a
  reply arrives.
- VARIAX_STARTUP_ACTIVATE:
  does activation, and queue for the next stage.
- VARIAX_STARTUP_SETUP:
  registers the card.

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

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This commit is contained in:

Takashi Iwai 2019-05-08 15:55:36 +02:00

parent a91c1da77c

commit 6ea53391c0

1 changed files with 35 additions and 93 deletions

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sound/usb/line6/variax.c

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