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Commit 9d416811 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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*()
parents df9200dd cf0baf16

Documentation/sound/alsa/ALSA-Configuration.txt

+6 −0
Original line number Diff line number Diff line
@@ -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

  ------------------

include/sound/core.h

+14 −24
Original line number Diff line number Diff line
@@ -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

sound/core/misc.c

+48 −27
Original line number Diff line number Diff line
@@ -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 (*path == '/')

		return strrchr(path, '/') + 1;

	else

		return path;

}



	if (format[0] == '<' && format[1] >= '0' && format[1] <= '7' && format[2] == '>') {

/* 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];

		printk("%sALSA %s:%d: ", tmp, file, line);

		format += 3;

	} else {

		printk("ALSA %s:%d: ", file, line);

		pfx = tmp;

		ret = 1;

	}

	va_start(args, format);

	vprintk(format, args);

	va_end(args);

	printk("%sALSA %s:%d: ", pfx, file, line);

	return ret;

}



EXPORT_SYMBOL(snd_verbose_printk);

#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