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ASoC: dmaengine: Convert to generic PCM copy ops

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This patch converts the ASoC dmaenging driver code to use the new
unified PCM copy callback.  It's a straightforward conversion from
*_user() to *_iter() variants.

The process callback is still using the direct pointer as of now, but
it'll be converted in the next patch.

Note that copy_from/to_iter() returns the copied bytes, hence the
error condition is adjusted accordingly.

Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20230815190136.8987-22-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2023-08-15 21:01:32 +02:00
parent ce2d8ed8d8
commit 56b00d10ff
1 changed files with 9 additions and 8 deletions
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17
sound/soc/soc-generic-dmaengine-pcm.c
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@ -287,10 +287,10 @@ static snd_pcm_uframes_t dmaengine_pcm_pointer(
return snd_dmaengine_pcm_pointer(substream);
}
static int dmaengine_copy_user(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void __user *buf, unsigned long bytes)
static int dmaengine_copy(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
struct iov_iter *buf, unsigned long bytes)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct dmaengine_pcm *pcm = soc_component_to_pcm(component);
@ -300,19 +300,20 @@ static int dmaengine_copy_user(struct snd_soc_component *component,
bool is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
void *dma_ptr = runtime->dma_area + hwoff +
channel * (runtime->dma_bytes / runtime->channels);
void *ptr = (void __force *)iter_iov_addr(buf);
if (is_playback)
if (copy_from_user(dma_ptr, buf, bytes))
if (copy_from_iter(dma_ptr, bytes, buf) != bytes)
return -EFAULT;
if (process) {
int ret = process(substream, channel, hwoff, (__force void *)buf, bytes);
int ret = process(substream, channel, hwoff, ptr, bytes);
if (ret < 0)
return ret;
}
if (!is_playback)
if (copy_to_user(buf, dma_ptr, bytes))
if (copy_to_iter(dma_ptr, bytes, buf) != bytes)
return -EFAULT;
return 0;
@ -337,7 +338,7 @@ static const struct snd_soc_component_driver dmaengine_pcm_component_process = {
.hw_params = dmaengine_pcm_hw_params,
.trigger = dmaengine_pcm_trigger,
.pointer = dmaengine_pcm_pointer,
.copy_user = dmaengine_copy_user,
.copy = dmaengine_copy,
.pcm_construct = dmaengine_pcm_new,
};