[alsa-devel] [for 2.6.34][PATCH] ALSA: pcm_lib - fix xrun functionality

[Jarkko Nikula]

The commit 4d96eb255c53ab5e39b37fd4d484ea3dc39ab456 broke the interrupt
time xrun functionality (stream stop etc.) if the CONFIG_SND_PCM_XRUN_DEBUG
is not set. This is because the xrun() is null defined without it.

Fix this by letting the function xrun() to be always defined as it was
before.

Signed-off-by: Jarkko Nikula <jhnikula at gmail.com>
Cc: Jaroslav Kysela <perex at perex.cz>
---
 sound/core/pcm_lib.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index b546ac2..a2ff861 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -148,6 +148,9 @@ static void pcm_debug_name(struct snd_pcm_substream *substream,
 
 #define xrun_debug(substream, mask) \
 			((substream)->pstr->xrun_debug & (mask))
+#else
+#define xrun_debug(substream, mask)	0
+#endif
 
 #define dump_stack_on_xrun(substream) do {			\
 		if (xrun_debug(substream, XRUN_DEBUG_STACK))	\
@@ -169,6 +172,7 @@ static void xrun(struct snd_pcm_substream *substream)
 	}
 }
 
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
 #define hw_ptr_error(substream, fmt, args...)				\
 	do {								\
 		if (xrun_debug(substream, XRUN_DEBUG_BASIC)) {		\
@@ -255,8 +259,6 @@ static void xrun_log_show(struct snd_pcm_substream *substream)
 
 #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */
 
-#define xrun_debug(substream, mask)	0
-#define xrun(substream)			do { } while (0)
 #define hw_ptr_error(substream, fmt, args...) do { } while (0)
 #define xrun_log(substream, pos)	do { } while (0)
 #define xrun_log_show(substream)	do { } while (0)
-- 
1.7.0