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ALSA: compress: make use of runtime buffer for copy 

Default copy function uses kmalloc to allocate buffers, lets check
if the runtime buffers are setup before making this allocations.
This can be useful if the buffers are dma buffers.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Srinivas Kandagatla 2018-11-15 18:13:21 +00:00 committed by Mark Brown
parent ba02eed9f3
commit d00f749b00
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 15 additions and 3 deletions
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14
sound/core/compress_offload.c
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@ -171,6 +171,7 @@ static int snd_compr_free(struct inode *inode, struct file *f)
}
data->stream.ops->free(&data->stream);
if (!data->stream.runtime->dma_buffer_p)
kfree(data->stream.runtime->buffer);
kfree(data->stream.runtime);
kfree(data);
@ -505,7 +506,7 @@ static int snd_compr_allocate_buffer(struct snd_compr_stream *stream,
struct snd_compr_params *params)
{
unsigned int buffer_size;
void *buffer;
void *buffer = NULL;
buffer_size = params->buffer.fragment_size * params->buffer.fragments;
if (stream->ops->copy) {
@ -513,8 +514,19 @@ static int snd_compr_allocate_buffer(struct snd_compr_stream *stream,
/* if copy is defined the driver will be required to copy
* the data from core
*/
} else {
if (stream->runtime->dma_buffer_p) {
if (buffer_size > stream->runtime->dma_buffer_p->bytes)
dev_err(&stream->device->dev,
"Not enough DMA buffer");
else
buffer = stream->runtime->dma_buffer_p->area;
} else {
buffer = kmalloc(buffer_size, GFP_KERNEL);
}
if (!buffer)
return -ENOMEM;
}