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ALSA: hda - Use own workqueue

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snd-hda-intel driver used schedule_work() fot the delayed DMA pointer
updates, but this has several potential problems:
- it may block other eventsd works longer
- it may deadlock when probing fails and flush_scheduled_work() is
  called during probe callback (as probe callback itself could be
  invoked from eventd)

This patch adds an own workq for each driver instance to solve these
problems.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2009-01-12 10:09:24 +01:00
parent 4b55899104
commit 6acaed38a3
4 changed files with 21 additions and 10 deletions
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sound/pci/hda/hda_codec.h
+1
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@@ -614,6 +614,7 @@ struct hda_bus {
/* unsolicited event queue */
struct hda_bus_unsolicited *unsol;
struct workqueue_struct *workq; /* common workqueue for codecs */
/* assigned PCMs */
DECLARE_BITMAP(pcm_dev_bits, SNDRV_PCM_DEVICES);