The patch lets the buf_size to align with period_bytes to prevent the
buffer reading over the real size of the DSP buffer and also avoid to
calculate the wrong size of remaining data.
Signed-off-by: Oder Chiou <oder_chiou@xxxxxxxxxxx>
---
sound/soc/codecs/rt5514-spi.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index c722f33..076116b 100644
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -147,8 +147,13 @@ static void rt5514_spi_copy_work(struct work_struct *work)
static void rt5514_schedule_copy(struct rt5514_dsp *rt5514_dsp)
{
+ size_t period_bytes;
u8 buf[8];
+ if (!rt5514_dsp->substream)
+ return;
+
+ period_bytes = snd_pcm_lib_period_bytes(rt5514_dsp->substream);
rt5514_dsp->get_size = 0;
/**
@@ -176,6 +181,10 @@ static void rt5514_schedule_copy(struct rt5514_dsp *rt5514_dsp)
rt5514_dsp->buf_size = rt5514_dsp->buf_limit - rt5514_dsp->buf_base;
+ if (rt5514_dsp->buf_size % period_bytes)
+ rt5514_dsp->buf_size = (rt5514_dsp->buf_size / period_bytes) *
+ period_bytes;
+
if (rt5514_dsp->buf_base && rt5514_dsp->buf_limit &&
rt5514_dsp->buf_rp && rt5514_dsp->buf_size)
schedule_delayed_work(&rt5514_dsp->copy_work, 0);
--
2.7.4
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