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

Message ID 1501480063-32225-1-git-send-email-oder_chiou@realtek.com (mailing list archive)
State Accepted
Commit 818010dac09183e99ff02e35836544b2e1d659f3
Headers show

Commit Message

Oder Chiou July 31, 2017, 5:47 a.m. UTC 
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@realtek.com>
---
 sound/soc/codecs/rt5514-spi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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Patch

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;
 }