ASoC: tlv320dac33: Fix inconsistent spinlock usage

The lock is used within the interrupt handler.
Correct the spinlock usage, and use irqsave/irqrestore
flavour of spin_lock/unlock.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index 71d7be8..93f38b1 100644 (file)
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -670,6 +670,7 @@ static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
 {
        struct snd_soc_codec *codec = dac33->codec;
        unsigned int delay;
+       unsigned long flags;
 
        switch (dac33->fifo_mode) {
        case DAC33_FIFO_MODE1:
@@ -677,10 +678,10 @@ static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
                        DAC33_THRREG(dac33->nsample));
 
                /* Take the timestamps */
-               spin_lock_irq(&dac33->lock);
+               spin_lock_irqsave(&dac33->lock, flags);
                dac33->t_stamp2 = ktime_to_us(ktime_get());
                dac33->t_stamp1 = dac33->t_stamp2;
-               spin_unlock_irq(&dac33->lock);
+               spin_unlock_irqrestore(&dac33->lock, flags);
 
                dac33_write16(codec, DAC33_PREFILL_MSB,
                                DAC33_THRREG(dac33->alarm_threshold));
@@ -692,11 +693,11 @@ static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
                break;
        case DAC33_FIFO_MODE7:
                /* Take the timestamp */
-               spin_lock_irq(&dac33->lock);
+               spin_lock_irqsave(&dac33->lock, flags);
                dac33->t_stamp1 = ktime_to_us(ktime_get());
                /* Move back the timestamp with drain time */
                dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
-               spin_unlock_irq(&dac33->lock);
+               spin_unlock_irqrestore(&dac33->lock, flags);
 
                dac33_write16(codec, DAC33_PREFILL_MSB,
                                DAC33_THRREG(DAC33_MODE7_MARGIN));
@@ -714,13 +715,14 @@ static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
 {
        struct snd_soc_codec *codec = dac33->codec;
+       unsigned long flags;
 
        switch (dac33->fifo_mode) {
        case DAC33_FIFO_MODE1:
                /* Take the timestamp */
-               spin_lock_irq(&dac33->lock);
+               spin_lock_irqsave(&dac33->lock, flags);
                dac33->t_stamp2 = ktime_to_us(ktime_get());
-               spin_unlock_irq(&dac33->lock);
+               spin_unlock_irqrestore(&dac33->lock, flags);
 
                dac33_write16(codec, DAC33_NSAMPLE_MSB,
                                DAC33_THRREG(dac33->nsample));
@@ -773,10 +775,11 @@ static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
 {
        struct snd_soc_codec *codec = dev;
        struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+       unsigned long flags;
 
-       spin_lock(&dac33->lock);
+       spin_lock_irqsave(&dac33->lock, flags);
        dac33->t_stamp1 = ktime_to_us(ktime_get());
-       spin_unlock(&dac33->lock);
+       spin_unlock_irqrestore(&dac33->lock, flags);
 
        /* Do not schedule the workqueue in Mode7 */
        if (dac33->fifo_mode != DAC33_FIFO_MODE7)
@@ -1173,15 +1176,16 @@ static snd_pcm_sframes_t dac33_dai_delay(
        unsigned int time_delta, uthr;
        int samples_out, samples_in, samples;
        snd_pcm_sframes_t delay = 0;
+       unsigned long flags;
 
        switch (dac33->fifo_mode) {
        case DAC33_FIFO_BYPASS:
                break;
        case DAC33_FIFO_MODE1:
-               spin_lock(&dac33->lock);
+               spin_lock_irqsave(&dac33->lock, flags);
                t0 = dac33->t_stamp1;
                t1 = dac33->t_stamp2;
-               spin_unlock(&dac33->lock);
+               spin_unlock_irqrestore(&dac33->lock, flags);
                t_now = ktime_to_us(ktime_get());
 
                /* We have not started to fill the FIFO yet, delay is 0 */
@@ -1246,10 +1250,10 @@ static snd_pcm_sframes_t dac33_dai_delay(
                }
                break;
        case DAC33_FIFO_MODE7:
-               spin_lock(&dac33->lock);
+               spin_lock_irqsave(&dac33->lock, flags);
                t0 = dac33->t_stamp1;
                uthr = dac33->uthr;
-               spin_unlock(&dac33->lock);
+               spin_unlock_irqrestore(&dac33->lock, flags);
                t_now = ktime_to_us(ktime_get());
 
                /* We have not started to fill the FIFO yet, delay is 0 */