During development of V5 of the i2s-tdm patch series, I replaced
the atomic refcount with a regular integer, as it was only ever
accessed within a spinlock.
Foolishly, I got the semantics of atomic_dec_and_test wrong, which
resulted in a test for 0 actually becoming a test for >0.
The result was that setting the audio frequency broke; switching
from 44100 Hz audio playback to 96000 Hz audio playback would
garble the sound most unpleasantly.
Fix this by checking for --refcount == 0, which is what it should
have been all along.
Fixes: 081068fd6414 ("ASoC: rockchip: add support for i2s-tdm controller")
Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@xxxxxxxxx>
---
sound/soc/rockchip/rockchip_i2s_tdm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/rockchip/rockchip_i2s_tdm.c b/sound/soc/rockchip/rockchip_i2s_tdm.c
index 396277eaa417..5d3abbada72a 100644
--- a/sound/soc/rockchip/rockchip_i2s_tdm.c
+++ b/sound/soc/rockchip/rockchip_i2s_tdm.c
@@ -408,7 +408,7 @@ static void rockchip_snd_txrxctrl(struct snd_pcm_substream *substream,
else
rockchip_disable_rde(i2s_tdm->regmap);
- if (--i2s_tdm->refcount) {
+ if (--i2s_tdm->refcount == 0) {
rockchip_snd_xfer_clear(i2s_tdm,
I2S_CLR_TXC | I2S_CLR_RXC);
}
--
2.33.1
