At Wed, 04 Mar 2009 16:32:23 +0100, Roel Kluin wrote:

vi sound/core/oss/pcm_oss.c +1572 (in linus' git tree) and note:

static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) { ... size_t size; ... :1608 size = runtime->oss.period_bytes - runtime->oss.period_ptr;

can this period_bytes - buffer_used become less than 0?

You mean "period_bytes - period_ptr"? Then no, period_ptr is always smaller than period_bytes.

Takashi