ASoC: ssm2518: Fix off-by-one error by ffs()
ffs() returns the bit position from 1, while the ssm2158 driver code
assumes it being 0-based. Also, the bit mask computation of the two
channel slots are incorrect; it must have worked just casually.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/ssm2518.c b/sound/soc/codecs/ssm2518.c
index 95aed55..cc8debc 100644
--- a/sound/soc/codecs/ssm2518.c
+++ b/sound/soc/codecs/ssm2518.c
@@ -549,13 +549,13 @@
right_slot = 0;
} else {
/* We assume the left channel < right channel */
- left_slot = ffs(tx_mask);
- tx_mask &= ~(1 << tx_mask);
+ left_slot = __ffs(tx_mask);
+ tx_mask &= ~(1 << left_slot);
if (tx_mask == 0) {
right_slot = left_slot;
} else {
- right_slot = ffs(tx_mask);
- tx_mask &= ~(1 << tx_mask);
+ right_slot = __ffs(tx_mask);
+ tx_mask &= ~(1 << right_slot);
}
}