diff options
| author | Takashi Iwai <tiwai@suse.de> | 2025-06-10 08:43:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-10 16:05:06 +0200 |
| commit | f42b8e5753954ff2d55cc97e6eea2b5ebe1a5438 (patch) | |
| tree | a299ea2b92e70986fadc3095a445d16734ade4e4 | |
| parent | c5e0af68c8994da0f4fe40094180c74898f1aec8 (diff) | |
ALSA: sb: Force to disable DMAs once when DMA mode is changed
[ Upstream commit 4c267ae2ef349639b4d9ebf00dd28586a82fdbe6 ]
When the DMA mode is changed on the (still real!) SB AWE32 after
playing a stream and closing, the previous DMA setup was still
silently kept, and it can confuse the hardware, resulting in the
unexpected noises. As a workaround, enforce the disablement of DMA
setups when the DMA setup is changed by the kcontrol.
https://bugzilla.kernel.org/show_bug.cgi?id=218185
Link: https://patch.msgid.link/20250610064322.26787-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | sound/isa/sb/sb16_main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/isa/sb/sb16_main.c b/sound/isa/sb/sb16_main.c index c4930efd44e3..5a083eecaa6b 100644 --- a/sound/isa/sb/sb16_main.c +++ b/sound/isa/sb/sb16_main.c @@ -714,6 +714,10 @@ static int snd_sb16_dma_control_put(struct snd_kcontrol *kcontrol, struct snd_ct change = nval != oval; snd_sb16_set_dma_mode(chip, nval); spin_unlock_irqrestore(&chip->reg_lock, flags); + if (change) { + snd_dma_disable(chip->dma8); + snd_dma_disable(chip->dma16); + } return change; } |