ASoC: dwc: correct irq clear method

from Designware I2S datasheet, tx/rx XRUN irq is cleared by
reading register TOR/ROR, rather than by writing into them.

Signed-off-by: Yitian Bu <yitian.bu@tangramtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
index a3e97b46b64e3871ec9362b231d19f9334628229..0d28e3b356f67ea765f0445bb55d19aab4b02978 100644 (file)
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -131,10 +131,10 @@ static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream)
 
        if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
                for (i = 0; i < 4; i++)
-                       i2s_write_reg(dev->i2s_base, TOR(i), 0);
+                       i2s_read_reg(dev->i2s_base, TOR(i));
        } else {
                for (i = 0; i < 4; i++)
-                       i2s_write_reg(dev->i2s_base, ROR(i), 0);
+                       i2s_read_reg(dev->i2s_base, ROR(i));
        }
 }