ASoC: nuc900: No need to track the dma buffer in the driver state struct

The DMA buffer and address can be accessed through the snd_pcm_runtime.
There is no need to manually track them in the driver's state struct.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 5 insertions, 29 deletions

diff --git a/sound/soc/nuc900/nuc900-audio.h b/sound/soc/nuc900/nuc900-audio.h
index 59f7e8ed1a68..d0b725705914 100644
--- a/sound/soc/nuc900/nuc900-audio.h
+++ b/sound/soc/nuc900/nuc900-audio.h
@@ -100,10 +100,7 @@
 struct nuc900_audio {
         void __iomem *mmio;
         spinlock_t lock;
-        dma_addr_t dma_addr[2];
-        unsigned long buffersize[2];
         unsigned long irq_num;
-        struct snd_pcm_substream *substream;
         struct resource *res;
         struct clk *clk;
         struct device *dev;
diff --git a/sound/soc/nuc900/nuc900-pcm.c b/sound/soc/nuc900/nuc900-pcm.c
index b809fa909e4d..5ae5ca15b6d6 100644
--- a/sound/soc/nuc900/nuc900-pcm.c
+++ b/sound/soc/nuc900/nuc900-pcm.c
@@ -42,29 +42,10 @@ static const struct snd_pcm_hardware nuc900_pcm_hardware = {
 static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,
         struct snd_pcm_hw_params *params)
 {
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        struct nuc900_audio *nuc900_audio = runtime->private_data;
-        unsigned long flags;
-        int ret = 0;
-
-        ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
-        if (ret < 0)
-                return ret;
-
-        spin_lock_irqsave(&nuc900_audio->lock, flags);
-
-        nuc900_audio->substream = substream;
-        nuc900_audio->dma_addr[substream->stream] = runtime->dma_addr;
-        nuc900_audio->buffersize[substream->stream] =
-                                                params_buffer_bytes(params);
-
-        spin_unlock_irqrestore(&nuc900_audio->lock, flags);
-
-        return ret;
+        return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 }
 
-static void nuc900_update_dma_register(struct snd_pcm_substream *substream,
-                                dma_addr_t dma_addr, size_t count)
+static void nuc900_update_dma_register(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
         struct nuc900_audio *nuc900_audio = runtime->private_data;
@@ -78,8 +59,8 @@ static void nuc900_update_dma_register(struct snd_pcm_substream *substream,
                 mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
         }
 
-        AUDIO_WRITE(mmio_addr, dma_addr);
-        AUDIO_WRITE(mmio_len, count);
+        AUDIO_WRITE(mmio_addr, runtime->dma_addr);
+        AUDIO_WRITE(mmio_len, runtime->dma_bytes);
 }
 
 static void nuc900_dma_start(struct snd_pcm_substream *substream)
@@ -170,9 +151,7 @@ static int nuc900_dma_prepare(struct snd_pcm_substream *substream)
 
         spin_lock_irqsave(&nuc900_audio->lock, flags);
 
-        nuc900_update_dma_register(substream,
-                                nuc900_audio->dma_addr[substream->stream],
-                                nuc900_audio->buffersize[substream->stream]);
+        nuc900_update_dma_register(substream);
 
         val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);