ALSA: Make snd_pcm_debug_name usable outside pcm_lib

Formatting a PCM name is useful for module debug too.
Add snd_prefix when making function public.

[minor coding-style fixes by tiwai]

Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 8 insertions, 5 deletions

diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index f1341308beda..86d0caf91b35 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -128,7 +128,8 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
         }
 }
 
-static void pcm_debug_name(struct snd_pcm_substream *substream,
+#ifdef CONFIG_SND_DEBUG
+void snd_pcm_debug_name(struct snd_pcm_substream *substream,
                            char *name, size_t len)
 {
         snprintf(name, len, "pcmC%dD%d%c:%d",
@@ -137,6 +138,8 @@ static void pcm_debug_name(struct snd_pcm_substream *substream,
                  substream->stream ? 'c' : 'p',
                  substream->number);
 }
+EXPORT_SYMBOL(snd_pcm_debug_name);
+#endif
 
 #define XRUN_DEBUG_BASIC        (1<<0)
 #define XRUN_DEBUG_STACK        (1<<1)  /* dump also stack */
@@ -168,7 +171,7 @@ static void xrun(struct snd_pcm_substream *substream)
         snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
         if (xrun_debug(substream, XRUN_DEBUG_BASIC)) {
                 char name[16];
-                pcm_debug_name(substream, name, sizeof(name));
+                snd_pcm_debug_name(substream, name, sizeof(name));
                 snd_printd(KERN_DEBUG "XRUN: %s\n", name);
                 dump_stack_on_xrun(substream);
         }
@@ -243,7 +246,7 @@ static void xrun_log_show(struct snd_pcm_substream *substream)
                 return;
         if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit)
                 return;
-        pcm_debug_name(substream, name, sizeof(name));
+        snd_pcm_debug_name(substream, name, sizeof(name));
         for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) {
                 entry = &log->entries[idx];
                 if (entry->period_size == 0)
@@ -319,7 +322,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
         if (pos >= runtime->buffer_size) {
                 if (printk_ratelimit()) {
                         char name[16];
-                        pcm_debug_name(substream, name, sizeof(name));
+                        snd_pcm_debug_name(substream, name, sizeof(name));
                         xrun_log_show(substream);
                         snd_printd(KERN_ERR  "BUG: %s, pos = %ld, "
                                    "buffer size = %ld, period size = %ld\n",
@@ -364,7 +367,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
         if (xrun_debug(substream, in_interrupt ?
                         XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) {
                 char name[16];
-                pcm_debug_name(substream, name, sizeof(name));
+                snd_pcm_debug_name(substream, name, sizeof(name));
                 snd_printd("%s_update: %s: pos=%u/%u/%u, "
                            "hwptr=%ld/%ld/%ld/%ld\n",
                            in_interrupt ? "period" : "hwptr",