From 60ed286a61b43e3fedf18e63f2d71b758f3505aa Mon Sep 17 00:00:00 2001
From: Daniel Mack <zonque@gmail.com>
Date: Wed, 18 May 2011 11:28:39 +0200
Subject: [PATCH] ALSA: usb-audio: make hwc_debug a noop in case HW_CONST_DEBUG
is not set
Just defining it to nothing is dangerous as it can alter the code
execution flow, for example when used in as only function in a
conditional code block.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/debug.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/usb/debug.h b/sound/usb/debug.h
index 343ec2d9ee66..58030176f008 100644
--- a/sound/usb/debug.h
+++ b/sound/usb/debug.h
@@ -8,7 +8,7 @@
#ifdef HW_CONST_DEBUG
#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
#else
-#define hwc_debug(fmt, args...) /**/
+#define hwc_debug(fmt, args...) do { } while(0)
#endif
#endif /* __USBAUDIO_DEBUG_H */
--
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