Andres Salomon 222fa0b0d2 [ALSA] cs5535audio: fix PRD register save/restore power management race ... In the suspend path, we currently save the PRD registers and then disable DMA. This is racy; the sound hardware might update the PRD register as it finishes processing some DMA pages between when we've saved the PRD registers and when DMA actually gets disabled. Furthermore, we actively check whether or not DMA is enabled before saving PRD registers; there's no reason to do that, as the PRD registers should not update when we twiddle the ACC_BM[x]_CMD register(s). Worst case, we save the PRD registers twice; even powering down the ACC shouldn't mess with the PRD registers (according to the 5536 data sheet, section 5.3.7.4, power-down procedure). This patch reworks all that to first disable DMA, and then save PRD registers. Signed-off-by: Andres Salomon <dilinger@debian.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>		2007-10-16 15:59:52 +02:00
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cs5535audio_pcm.c	[ALSA] cs5535audio: fix PRD register save/restore power management race	2007-10-16 15:59:52 +02:00
cs5535audio_pm.c	[ALSA] cs5535audio: fix PRD register save/restore power management race	2007-10-16 15:59:52 +02:00
cs5535audio.c
cs5535audio.h	[ALSA] cs5535audio: fix PRD register save/restore power management race	2007-10-16 15:59:52 +02:00
Makefile	[ALSA] Clean up Makefile	2007-10-16 15:58:05 +02:00