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usb: gadget: u_audio: Use managed buffer allocation 

Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and dropped.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20191210141822.18705-2-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2019-12-10 15:18:21 +01:00 committed by Greg Kroah-Hartman
parent e880c3744b
commit d27ab1e609
1 changed files with 2 additions and 16 deletions
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18
drivers/usb/gadget/function/u_audio.c
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@ -239,18 +239,6 @@ static snd_pcm_uframes_t uac_pcm_pointer(struct snd_pcm_substream *substream)
return bytes_to_frames(substream->runtime, prm->hw_ptr);
}
static int uac_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
return snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
}
static int uac_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static int uac_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_uac_chip *uac = snd_pcm_substream_chip(substream);
@ -327,8 +315,6 @@ static const struct snd_pcm_ops uac_pcm_ops = {
.open = uac_pcm_open,
.close = uac_pcm_null,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = uac_pcm_hw_params,
.hw_free = uac_pcm_hw_free,
.trigger = uac_pcm_trigger,
.pointer = uac_pcm_pointer,
.prepare = uac_pcm_null,
@ -584,8 +570,8 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
strlcpy(card->shortname, card_name, sizeof(card->shortname));
sprintf(card->longname, "%s %i", card_name, card->dev->id);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
NULL, 0, BUFF_SIZE_MAX);
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
NULL, 0, BUFF_SIZE_MAX);
err = snd_card_register(card);