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ALSA: pcm - A helper function to compose PCM stream name for debug prints 

Use a common helper function for the PCM stream name displayed in
XRUN and buffer-pointer debug prints.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-06-08 15:58:48 +02:00
parent ab1863fc9b
commit c00701101b
1 changed files with 17 additions and 6 deletions
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23
sound/core/pcm_lib.c
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@ -136,6 +136,16 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
dump_stack(); \
} while (0)
static void pcm_debug_name(struct snd_pcm_substream *substream,
char *name, size_t len)
{
snprintf(name, len, "pcmC%dD%d%c:%d",
substream->pcm->card->number,
substream->pcm->device,
substream->stream ? 'c' : 'p',
substream->number);
}
static void xrun(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
@ -144,10 +154,9 @@ static void xrun(struct snd_pcm_substream *substream)
snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
if (xrun_debug(substream, 1)) {
snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n",
substream->pcm->card->number,
substream->pcm->device,
substream->stream ? 'c' : 'p');
char name[16];
pcm_debug_name(substream, name, sizeof(name));
snd_printd(KERN_DEBUG "XRUN: %s\n", name);
dump_stack_on_xrun(substream);
}
}
@ -163,9 +172,11 @@ snd_pcm_update_hw_ptr_pos(struct snd_pcm_substream *substream,
return pos; /* XRUN */
if (pos >= runtime->buffer_size) {
if (printk_ratelimit()) {
snd_printd(KERN_ERR "BUG: stream = %i, pos = 0x%lx, "
char name[16];
pcm_debug_name(substream, name, sizeof(name));
snd_printd(KERN_ERR "BUG: %s, pos = 0x%lx, "
"buffer size = 0x%lx, period size = 0x%lx\n",
substream->stream, pos, runtime->buffer_size,
name, pos, runtime->buffer_size,
runtime->period_size);
}
pos = 0;