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Merge branch 'topic/snd-printk' into for-linus 

* topic/snd-printk:
  ALSA: Fixed a typo of printk()
  ALSA: Add debug module option
  ALSA: core - strip too long file names in snd_print*()
This commit is contained in:
Takashi Iwai 2009-09-10 15:33:03 +02:00
parent df9200dd04 cf0baf16c3
commit 9d416811f8
3 changed files with 69 additions and 52 deletions
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6
Documentation/sound/alsa/ALSA-Configuration.txt
View File

@ -60,6 +60,12 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
slots - Reserve the slot index for the given driver.
This option takes multiple strings.
See "Module Autoloading Support" section for details.
debug - Specifies the debug message level
(0 = disable debug prints, 1 = normal debug messages,
2 = verbose debug messages)
This option appears only when CONFIG_SND_DEBUG=y.
This option can be dynamically changed via sysfs
/sys/modules/snd/parameters/debug file.
Module snd-pcm-oss
------------------

38
include/sound/core.h
View File

@ -329,18 +329,17 @@ unsigned int snd_dma_pointer(unsigned long dma, unsigned int size);
struct resource;
void release_and_free_resource(struct resource *res);
#ifdef CONFIG_SND_VERBOSE_PRINTK
void snd_verbose_printk(const char *file, int line, const char *format, ...)
__attribute__ ((format (printf, 3, 4)));
#endif
#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
void snd_verbose_printd(const char *file, int line, const char *format, ...)
__attribute__ ((format (printf, 3, 4)));
#endif
/* --- */
#ifdef CONFIG_SND_VERBOSE_PRINTK
#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
void __snd_printk(unsigned int level, const char *file, int line,
const char *format, ...)
__attribute__ ((format (printf, 4, 5)));
#else
#define __snd_printk(level, file, line, format, args...) \
printk(format, ##args)
#endif
/**
* snd_printk - printk wrapper
* @fmt: format string
@ -349,15 +348,9 @@ void snd_verbose_printd(const char *file, int line, const char *format, ...)
* when configured with CONFIG_SND_VERBOSE_PRINTK.
*/
#define snd_printk(fmt, args...) \
snd_verbose_printk(__FILE__, __LINE__, fmt ,##args)
#else
#define snd_printk(fmt, args...) \
printk(fmt ,##args)
#endif
__snd_printk(0, __FILE__, __LINE__, fmt, ##args)
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_VERBOSE_PRINTK
/**
* snd_printd - debug printk
* @fmt: format string
@ -366,11 +359,7 @@ void snd_verbose_printd(const char *file, int line, const char *format, ...)
* Ignored when CONFIG_SND_DEBUG is not set.
*/
#define snd_printd(fmt, args...) \
snd_verbose_printd(__FILE__, __LINE__, fmt ,##args)
#else
#define snd_printd(fmt, args...) \
printk(fmt ,##args)
#endif
__snd_printk(1, __FILE__, __LINE__, fmt, ##args)
/**
* snd_BUG - give a BUG warning message and stack trace
@ -417,9 +406,10 @@ static inline int __snd_bug_on(int cond)
* Works like snd_printk() for debugging purposes.
* Ignored when CONFIG_SND_DEBUG_VERBOSE is not set.
*/
#define snd_printdd(format, args...) snd_printk(format, ##args)
#define snd_printdd(format, args...) \
__snd_printk(2, __FILE__, __LINE__, format, ##args)
#else
#define snd_printdd(format, args...) /* nothing */
#define snd_printdd(format, args...) do { } while (0)
#endif

77
sound/core/misc.c
View File

@ -24,6 +24,20 @@
#include <linux/ioport.h>
#include <sound/core.h>
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_DEBUG_VERBOSE
#define DEFAULT_DEBUG_LEVEL 2
#else
#define DEFAULT_DEBUG_LEVEL 1
#endif
static int debug = DEFAULT_DEBUG_LEVEL;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
#endif /* CONFIG_SND_DEBUG */
void release_and_free_resource(struct resource *res)
{
if (res) {
@ -35,46 +49,53 @@ void release_and_free_resource(struct resource *res)
EXPORT_SYMBOL(release_and_free_resource);
#ifdef CONFIG_SND_VERBOSE_PRINTK
void snd_verbose_printk(const char *file, int line, const char *format, ...)
/* strip the leading path if the given path is absolute */
static const char *sanity_file_name(const char *path)
{
va_list args;
if (format[0] == '<' && format[1] >= '0' && format[1] <= '7' && format[2] == '>') {
char tmp[] = "<0>";
tmp[1] = format[1];
printk("%sALSA %s:%d: ", tmp, file, line);
format += 3;
} else {
printk("ALSA %s:%d: ", file, line);
}
va_start(args, format);
vprintk(format, args);
va_end(args);
if (*path == '/')
return strrchr(path, '/') + 1;
else
return path;
}
EXPORT_SYMBOL(snd_verbose_printk);
/* print file and line with a certain printk prefix */
static int print_snd_pfx(unsigned int level, const char *path, int line,
const char *format)
{
const char *file = sanity_file_name(path);
char tmp[] = "<0>";
const char *pfx = level ? KERN_DEBUG : KERN_DEFAULT;
int ret = 0;
if (format[0] == '<' && format[2] == '>') {
tmp[1] = format[1];
pfx = tmp;
ret = 1;
}
printk("%sALSA %s:%d: ", pfx, file, line);
return ret;
}
#else
#define print_snd_pfx(level, path, line, format) 0
#endif
#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
void snd_verbose_printd(const char *file, int line, const char *format, ...)
#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
void __snd_printk(unsigned int level, const char *path, int line,
const char *format, ...)
{
va_list args;
if (format[0] == '<' && format[1] >= '0' && format[1] <= '7' && format[2] == '>') {
char tmp[] = "<0>";
tmp[1] = format[1];
printk("%sALSA %s:%d: ", tmp, file, line);
format += 3;
} else {
printk(KERN_DEBUG "ALSA %s:%d: ", file, line);
}
#ifdef CONFIG_SND_DEBUG
if (debug < level)
return;
#endif
va_start(args, format);
if (print_snd_pfx(level, path, line, format))
format += 3; /* skip the printk level-prefix */
vprintk(format, args);
va_end(args);
}
EXPORT_SYMBOL(snd_verbose_printd);
EXPORT_SYMBOL_GPL(__snd_printk);
#endif
#ifdef CONFIG_PCI