From: Martin Povišer povik+lin@cutebit.org
[ Upstream commit e59bf547a7dd366f93bfebb7487959580ca6c0ec ]
There's a special branch in the set_tdm_slot op for the case of nslots being 1, but:
(1) That branch can never work (there's a check for tx_mask being non-zero, later there's another check for it *being* zero; one or the other always throws -EINVAL).
(2) The intention of the branch seems to be what the general other branch reduces to in case of nslots being 1.
For those reasons remove the 'nslots being 1' special case.
Fixes: 1a476abc723e ("tas2770: add tas2770 smart PA kernel driver") Suggested-by: Jos Dehaes jos.dehaes@gmail.com Signed-off-by: Martin Povišer povik+lin@cutebit.org Link: https://lore.kernel.org/r/20221027095800.16094-1-povik+lin@cutebit.org Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/tas2770.c | 20 ++++++-------------- 1 file changed, 6 insertions(+), 14 deletions(-)
diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c index a13b086a072b..ec0df3b1ef61 100644 --- a/sound/soc/codecs/tas2770.c +++ b/sound/soc/codecs/tas2770.c @@ -395,21 +395,13 @@ static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai, if (tx_mask == 0 || rx_mask != 0) return -EINVAL;
- if (slots == 1) { - if (tx_mask != 1) - return -EINVAL; - - left_slot = 0; - right_slot = 0; + left_slot = __ffs(tx_mask); + tx_mask &= ~(1 << left_slot); + if (tx_mask == 0) { + right_slot = left_slot; } else { - 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 << right_slot); - } + right_slot = __ffs(tx_mask); + tx_mask &= ~(1 << right_slot); }
if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)