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Subject[PATCH 17/18] ALSA: hal2: pass struct device to DMA API functions
Date
The DMA API generally relies on a struct device to work properly, and
only barely works without one for legacy reasons. Pass the easily
available struct device from the platform_device to remedy this.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
sound/mips/hal2.c | 31 +++++++++++++++++--------------
1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/sound/mips/hal2.c b/sound/mips/hal2.c
index a4ed54aeaf1d..d63e1565b62b 100644
--- a/sound/mips/hal2.c
+++ b/sound/mips/hal2.c
@@ -454,21 +454,22 @@ static inline void hal2_stop_adc(struct snd_hal2 *hal2)
hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
}

-static int hal2_alloc_dmabuf(struct hal2_codec *codec)
+static int hal2_alloc_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec)
{
+ struct device *dev = hal2->card->dev;
struct hal2_desc *desc;
dma_addr_t desc_dma, buffer_dma;
int count = H2_BUF_SIZE / H2_BLOCK_SIZE;
int i;

- codec->buffer = dma_alloc_attrs(NULL, H2_BUF_SIZE, &buffer_dma,
+ codec->buffer = dma_alloc_attrs(dev, H2_BUF_SIZE, &buffer_dma,
GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
if (!codec->buffer)
return -ENOMEM;
- desc = dma_alloc_attrs(NULL, count * sizeof(struct hal2_desc),
+ desc = dma_alloc_attrs(dev, count * sizeof(struct hal2_desc),
&desc_dma, GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
if (!desc) {
- dma_free_attrs(NULL, H2_BUF_SIZE, codec->buffer, buffer_dma,
+ dma_free_attrs(dev, H2_BUF_SIZE, codec->buffer, buffer_dma,
DMA_ATTR_NON_CONSISTENT);
return -ENOMEM;
}
@@ -482,17 +483,19 @@ static int hal2_alloc_dmabuf(struct hal2_codec *codec)
desc_dma : desc_dma + (i + 1) * sizeof(struct hal2_desc);
desc++;
}
- dma_cache_sync(NULL, codec->desc, count * sizeof(struct hal2_desc),
+ dma_cache_sync(dev, codec->desc, count * sizeof(struct hal2_desc),
DMA_TO_DEVICE);
codec->desc_count = count;
return 0;
}

-static void hal2_free_dmabuf(struct hal2_codec *codec)
+static void hal2_free_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec)
{
- dma_free_attrs(NULL, codec->desc_count * sizeof(struct hal2_desc),
+ struct device *dev = hal2->card->dev;
+
+ dma_free_attrs(dev, codec->desc_count * sizeof(struct hal2_desc),
codec->desc, codec->desc_dma, DMA_ATTR_NON_CONSISTENT);
- dma_free_attrs(NULL, H2_BUF_SIZE, codec->buffer, codec->buffer_dma,
+ dma_free_attrs(dev, H2_BUF_SIZE, codec->buffer, codec->buffer_dma,
DMA_ATTR_NON_CONSISTENT);
}

@@ -540,7 +543,7 @@ static int hal2_playback_open(struct snd_pcm_substream *substream)

runtime->hw = hal2_pcm_hw;

- err = hal2_alloc_dmabuf(&hal2->dac);
+ err = hal2_alloc_dmabuf(hal2, &hal2->dac);
if (err)
return err;
return 0;
@@ -550,7 +553,7 @@ static int hal2_playback_close(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);

- hal2_free_dmabuf(&hal2->dac);
+ hal2_free_dmabuf(hal2, &hal2->dac);
return 0;
}

@@ -606,7 +609,7 @@ static void hal2_playback_transfer(struct snd_pcm_substream *substream,
unsigned char *buf = hal2->dac.buffer + rec->hw_data;

memcpy(buf, substream->runtime->dma_area + rec->sw_data, bytes);
- dma_cache_sync(NULL, buf, bytes, DMA_TO_DEVICE);
+ dma_cache_sync(hal2->card->dev, buf, bytes, DMA_TO_DEVICE);

}

@@ -629,7 +632,7 @@ static int hal2_capture_open(struct snd_pcm_substream *substream)

runtime->hw = hal2_pcm_hw;

- err = hal2_alloc_dmabuf(adc);
+ err = hal2_alloc_dmabuf(hal2, adc);
if (err)
return err;
return 0;
@@ -639,7 +642,7 @@ static int hal2_capture_close(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);

- hal2_free_dmabuf(&hal2->adc);
+ hal2_free_dmabuf(hal2, &hal2->adc);
return 0;
}

@@ -694,7 +697,7 @@ static void hal2_capture_transfer(struct snd_pcm_substream *substream,
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
unsigned char *buf = hal2->adc.buffer + rec->hw_data;

- dma_cache_sync(NULL, buf, bytes, DMA_FROM_DEVICE);
+ dma_cache_sync(hal2->card->dev, buf, bytes, DMA_FROM_DEVICE);
memcpy(substream->runtime->dma_area + rec->sw_data, buf, bytes);
}

--
2.20.1
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