4 files changed, 21 insertions, 4 deletions

diff --git a/sound/soc/codecs/wm8753.c b/sound/soc/codecs/wm8753.c
index d28eeaceb857..49c4b2898aff 100644
--- a/sound/soc/codecs/wm8753.c
+++ b/sound/soc/codecs/wm8753.c
@@ -79,7 +79,7 @@ static const u16 wm8753_reg[] = {
         0x0097, 0x0097, 0x0000, 0x0004,
         0x0000, 0x0083, 0x0024, 0x01ba,
         0x0000, 0x0083, 0x0024, 0x01ba,
-        0x0000, 0x0000
+        0x0000, 0x0000, 0x0000
 };
 
 /* codec private data */
@@ -1660,11 +1660,11 @@ static int wm8753_register(struct wm8753_priv *wm8753)
         codec->set_bias_level = wm8753_set_bias_level;
         codec->dai = wm8753_dai;
         codec->num_dai = 2;
-        codec->reg_cache_size = ARRAY_SIZE(wm8753->reg_cache);
+        codec->reg_cache_size = ARRAY_SIZE(wm8753->reg_cache) + 1;
         codec->reg_cache = &wm8753->reg_cache;
         codec->private_data = wm8753;
 
-        memcpy(codec->reg_cache, wm8753_reg, sizeof(codec->reg_cache));
+        memcpy(codec->reg_cache, wm8753_reg, sizeof(wm8753->reg_cache));
         INIT_DELAYED_WORK(&codec->delayed_work, wm8753_work);
 
         ret = wm8753_reset(codec);
diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c
index efec33a1c5bd..f0a2d4071998 100644
--- a/sound/soc/fsl/mpc5200_dma.c
+++ b/sound/soc/fsl/mpc5200_dma.c
@@ -456,6 +456,7 @@ int mpc5200_audio_dma_create(struct of_device *op)
                 return -ENODEV;
 
         spin_lock_init(&psc_dma->lock);
+        mutex_init(&psc_dma->mutex);
         psc_dma->id = be32_to_cpu(*prop);
         psc_dma->irq = irq;
         psc_dma->psc_regs = regs;
diff --git a/sound/soc/fsl/mpc5200_dma.h b/sound/soc/fsl/mpc5200_dma.h
index 2000803f06a7..8d396bb9d9fe 100644
--- a/sound/soc/fsl/mpc5200_dma.h
+++ b/sound/soc/fsl/mpc5200_dma.h
@@ -55,6 +55,7 @@ struct psc_dma {
         unsigned int irq;
         struct device *dev;
         spinlock_t lock;
+        struct mutex mutex;
         u32 sicr;
         uint sysclk;
         int imr;
diff --git a/sound/soc/fsl/mpc5200_psc_ac97.c b/sound/soc/fsl/mpc5200_psc_ac97.c
index 794a247b3eb5..7eb549985d49 100644
--- a/sound/soc/fsl/mpc5200_psc_ac97.c
+++ b/sound/soc/fsl/mpc5200_psc_ac97.c
@@ -34,13 +34,20 @@ static unsigned short psc_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
         int status;
         unsigned int val;
 
+        mutex_lock(&psc_dma->mutex);
+
         /* Wait for command send status zero = ready */
         status = spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
                                 MPC52xx_PSC_SR_CMDSEND), 100, 0);
         if (status == 0) {
                 pr_err("timeout on ac97 bus (rdy)\n");
+                mutex_unlock(&psc_dma->mutex);
                 return -ENODEV;
         }
+
+        /* Force clear the data valid bit */
+        in_be32(&psc_dma->psc_regs->ac97_data);
+
         /* Send the read */
         out_be32(&psc_dma->psc_regs->ac97_cmd, (1<<31) | ((reg & 0x7f) << 24));
 
@@ -50,16 +57,19 @@ static unsigned short psc_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
         if (status == 0) {
                 pr_err("timeout on ac97 read (val) %x\n",
                                 in_be16(&psc_dma->psc_regs->sr_csr.status));
+                mutex_unlock(&psc_dma->mutex);
                 return -ENODEV;
         }
         /* Get the data */
         val = in_be32(&psc_dma->psc_regs->ac97_data);
         if (((val >> 24) & 0x7f) != reg) {
                 pr_err("reg echo error on ac97 read\n");
+                mutex_unlock(&psc_dma->mutex);
                 return -ENODEV;
         }
         val = (val >> 8) & 0xffff;
 
+        mutex_unlock(&psc_dma->mutex);
         return (unsigned short) val;
 }
 
@@ -68,16 +78,21 @@ static void psc_ac97_write(struct snd_ac97 *ac97,
 {
         int status;
 
+        mutex_lock(&psc_dma->mutex);
+
         /* Wait for command status zero = ready */
         status = spin_event_timeout(!(in_be16(&psc_dma->psc_regs->sr_csr.status) &
                                 MPC52xx_PSC_SR_CMDSEND), 100, 0);
         if (status == 0) {
                 pr_err("timeout on ac97 bus (write)\n");
-                return;
+                goto out;
         }
         /* Write data */
         out_be32(&psc_dma->psc_regs->ac97_cmd,
                         ((reg & 0x7f) << 24) | (val << 8));
+
+ out:
+        mutex_unlock(&psc_dma->mutex);
 }
 
 static void psc_ac97_warm_reset(struct snd_ac97 *ac97)