static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
int dir, struct snd_xferi32 __user *data32)
{
compat_caddr_t buf;
u32 frames;
int err;
if (! substream->runtime)
return -ENOTTY;
if (substream->stream != dir)
return -EINVAL;
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
if (get_user(buf, &data32->buf) ||
get_user(frames, &data32->frames))
return -EFAULT;
if (dir == SNDRV_PCM_STREAM_PLAYBACK)
err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
else
err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
if (err < 0)
return err;
/* copy the result */
if (put_user(err, &data32->result))
return -EFAULT;
return 0;
}
static size_t u_audio_capture(struct gaudio *card, void *buf, size_t count)
{
ssize_t result;
mm_segment_t old_fs;
snd_pcm_sframes_t frames;
int err = 0;
struct gaudio_snd_dev *snd = &card->capture;
struct snd_pcm_substream *substream = snd->substream;
struct snd_pcm_runtime *runtime = substream->runtime;
if (!audio_reinit) {
err = gaudio_open_streams();
if (err) {
pr_err("Failed to init audio streams: err %d", err);
return 0;
}
audio_reinit = 1;
}
try_again:
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ||
runtime->status->state == SNDRV_PCM_STATE_SETUP) {
result = snd_pcm_kernel_ioctl(substream,
SNDRV_PCM_IOCTL_PREPARE, NULL);
if (result < 0) {
pr_err("Preparing capture failed: %d\n",
(int)result);
return result;
}
}
frames = bytes_to_frames(runtime, count);
old_fs = get_fs();
set_fs(KERNEL_DS);
pr_debug("frames = %d, count = %d", (int)frames, count);
result = snd_pcm_lib_read(substream, buf, frames);
if (result != frames) {
pr_err("Capture error: %d\n", (int)result);
set_fs(old_fs);
goto try_again;
}
set_fs(old_fs);
return 0;
}