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>

3 files changed, 20 insertions, 26 deletions

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index e1bad1130616..ccf3a6e14f9f 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -507,6 +507,18 @@ void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
 void snd_pcm_vma_notify_data(void *client, void *data);
 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
 
+
+#ifdef CONFIG_SND_DEBUG
+void snd_pcm_debug_name(struct snd_pcm_substream *substream,
+                           char *name, size_t len);
+#else
+static inline void
+snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
+{
+        *buf = 0;
+}
+#endif
+
 /*
  *  PCM library
  */
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",
diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c
index b941d2541dda..eae62ebbd295 100644
--- a/sound/pci/asihpi/asihpi.c
+++ b/sound/pci/asihpi/asihpi.c
@@ -41,31 +41,10 @@
 #include <sound/tlv.h>
 #include <sound/hwdep.h>
 
-
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("AudioScience inc. <support@audioscience.com>");
 MODULE_DESCRIPTION("AudioScience ALSA ASI5000 ASI6000 ASI87xx ASI89xx");
 
-#if defined CONFIG_SND_DEBUG
-/* copied from pcm_lib.c, hope later patch will make that version public
-and this copy can be removed */
-static inline void
-snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
-{
-        snprintf(buf, size, "pcmC%dD%d%c:%d",
-                 substream->pcm->card->number,
-                 substream->pcm->device,
-                 substream->stream ? 'c' : 'p',
-                 substream->number);
-}
-#else
-static inline void
-snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
-{
-        *buf = 0;
-}
-#endif
-
 #if defined CONFIG_SND_DEBUG_VERBOSE
 /**
  * snd_printddd - very verbose debug printk