ASoC: rt5514-spi: Let the buf_size to align with period_bytes

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@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index 12f2ecf3a4fe..0896817ffc3f 100644
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -147,8 +147,13 @@ done:
 
 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);