Takashi Iwai 96c7d478ef ALSA: pcsp - Fix locking messes in snd-pcsp ... snd-pcsp driver takes chip->substream_lock together with PCM substream lock. These are even mixed up with hrtimer's lock, resulting in messy lock depencies. Right now, snd-pcsp driver resolves the deadlock by using HRTIMER_CB_SOFTIRQ. However, this isn't nice for a really fast path like bit-flipping. This patch introduces a tasklet for PCM period handling so that the hrtimer callback can be handled fast. This also reduce the use of chip->substream_lock to avoid deadlocks. It's still used in pointer callback, but even this could be removed with a proper barrier. Another good solution is to introduce async trigger callback. But, this will involve with a major rewrite of the PCM core code, so I take first this easy fix. Signed-off-by: Takashi Iwai <tiwai@suse.de>		2008-10-20 14:47:15 +02:00
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Makefile	[ALSA] Add PC-speaker sound driver	2008-04-24 12:00:20 +02:00
pcsp.c	ALSA: pcsp - Fix locking messes in snd-pcsp	2008-10-20 14:47:15 +02:00
pcsp.h	ALSA: pcsp - Fix locking messes in snd-pcsp	2008-10-20 14:47:15 +02:00
pcsp_input.c	[ALSA] Add PC-speaker sound driver	2008-04-24 12:00:20 +02:00
pcsp_input.h	[ALSA] Add PC-speaker sound driver	2008-04-24 12:00:20 +02:00
pcsp_lib.c	ALSA: pcsp - Fix locking messes in snd-pcsp	2008-10-20 14:47:15 +02:00
pcsp_mixer.c	[ALSA] snd-pcsp - fix pcsp_treble_info() to honour an item number	2008-05-25 18:21:10 +02:00