[alsa-devel] [PATCH 1/2] ASoC: rt5514: Add the sanity checks of the buffer related address

[Oder Chiou]

The patch add the sanity checks of the buffer related address to make sure
the addresses are valid.

Signed-off-by: Oder Chiou <oder_chiou at realtek.com>
---
 sound/soc/codecs/rt5514-spi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index 950d1ff..6f513cc 100644
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -173,9 +173,14 @@ static irqreturn_t rt5514_spi_irq(int irq, void *data)
 	rt5514_dsp->buf_rp = buf[0] | buf[1] << 8 | buf[2] << 16 |
 				buf[3] << 24;
 
+	if (rt5514_dsp->buf_rp % 8)
+		rt5514_dsp->buf_rp = (rt5514_dsp->buf_rp / 8) * 8;
+
 	rt5514_dsp->buf_size = rt5514_dsp->buf_limit - rt5514_dsp->buf_base;
 
-	schedule_delayed_work(&rt5514_dsp->copy_work, 0);
+	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);
 
 	return IRQ_HANDLED;
 }
-- 
2.7.4