Trigger callback is not the best place for buffer iterator initialization, so move it out to the prepare callback, where it have to be.

Minor enhancement: remove blank line.

Signed-off-by: Ivan Orlov ivan.orlov0322@gmail.com --- V1 -> V2: - Split changes in the patch into two different patches

sound/drivers/pcmtest.c | 33 ++++++++++++++++----------------- 1 file changed, 16 insertions(+), 17 deletions(-)

diff --git a/sound/drivers/pcmtest.c b/sound/drivers/pcmtest.c index 08e14b5eb772..dc7c9c758537 100644 --- a/sound/drivers/pcmtest.c +++ b/sound/drivers/pcmtest.c @@ -92,7 +92,6 @@ MODULE_PARM_DESC(inject_trigger_err, "Inject EINVAL error in the 'trigger' callb module_param(inject_open_err, bool, 0600); MODULE_PARM_DESC(inject_open_err, "Inject EBUSY error in the 'open' callback");

- struct pcmtst { struct snd_pcm *pcm; struct snd_card *card; @@ -405,25 +404,9 @@ static int snd_pcmtst_pcm_close(struct snd_pcm_substream *substream)

static int snd_pcmtst_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { - struct snd_pcm_runtime *runtime = substream->runtime; - struct pcmtst_buf_iter *v_iter = runtime->private_data; - if (inject_trigger_err) return -EINVAL;

- v_iter->sample_bytes = runtime->sample_bits / 8; - v_iter->period_bytes = frames_to_bytes(runtime, runtime->period_size); - if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED || - runtime->access == SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED) { - v_iter->chan_block = runtime->dma_bytes / runtime->channels; - v_iter->interleaved = false; - } else { - v_iter->interleaved = true; - } - // We want to record RATE * ch_cnt samples per sec, it is rate * sample_bytes * ch_cnt bytes - v_iter->s_rw_ch = runtime->rate / TIMER_PER_SEC; - v_iter->b_rw = v_iter->s_rw_ch * v_iter->sample_bytes * runtime->channels; - return 0; }

@@ -454,8 +437,24 @@ static void pcmtst_pdev_release(struct device *dev)

static int snd_pcmtst_pcm_prepare(struct snd_pcm_substream *substream) { + struct snd_pcm_runtime *runtime = substream->runtime; + struct pcmtst_buf_iter *v_iter = runtime->private_data; + if (inject_prepare_err) return -EINVAL; + + v_iter->sample_bytes = samples_to_bytes(runtime, 1); + v_iter->period_bytes = snd_pcm_lib_period_bytes(substream); + v_iter->interleaved = true; + if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED || + runtime->access == SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED) { + v_iter->chan_block = snd_pcm_lib_buffer_bytes(substream) / runtime->channels; + v_iter->interleaved = false; + } + // We want to record RATE * ch_cnt samples per sec, it is rate * sample_bytes * ch_cnt bytes + v_iter->s_rw_ch = runtime->rate / TIMER_PER_SEC; + v_iter->b_rw = v_iter->s_rw_ch * v_iter->sample_bytes * runtime->channels; + return 0; }