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wimax: allow specifying debug levels as command line option

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Add "debug" module options to all the wimax modules (including
drivers) so that the debug levels can be set upon kernel boot or
module load time.

This is needed as currently there was a limitation where the debug
levels could only be set when a device was succesfully
enumerated. This made it difficult to debug issues that made a device
not probe properly.

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
This commit is contained in:
Inaky Perez-Gonzalez
2009-09-02 15:36:05 -07:00
parent 4dc1bf074e
commit 4c2b1a1164
5 changed files with 112 additions and 0 deletions
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72
include/linux/wimax/debug.h
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@@ -450,4 +450,76 @@ do { \
})
static inline
void d_submodule_set(struct d_level *d_level, size_t d_level_size,
const char *submodule, u8 level, const char *tag)
{
struct d_level *itr, *top;
int index = -1;
for (itr = d_level, top = itr + d_level_size; itr < top; itr++) {
index++;
if (itr->name == NULL) {
printk(KERN_ERR "%s: itr->name NULL?? (%p, #%d)\n",
tag, itr, index);
continue;
}
if (!strcmp(itr->name, submodule)) {
itr->level = level;
return;
}
}
printk(KERN_ERR "%s: unknown submodule %s\n", tag, submodule);
}
/**
* d_parse_params - Parse a string with debug parameters from the
* command line
*
* @d_level: level structure (D_LEVEL)
* @d_level_size: number of items in the level structure
* (D_LEVEL_SIZE).
* @_params: string with the parameters; this is a space (not tab!)
* separated list of NAME:VALUE, where value is the debug level
* and NAME is the name of the submodule.
* @tag: string for error messages (example: MODULE.ARGNAME).
*/
static inline
void d_parse_params(struct d_level *d_level, size_t d_level_size,
const char *_params, const char *tag)
{
char submodule[130], *params, *params_orig, *token, *colon;
unsigned level, tokens;
if (_params == NULL)
return;
params_orig = kstrdup(_params, GFP_KERNEL);
params = params_orig;
while (1) {
token = strsep(&params, " ");
if (token == NULL)
break;
if (*token == '\0') /* eat joint spaces */
continue;
/* kernel's sscanf %s eats until whitespace, so we
* replace : by \n so it doesn't get eaten later by
* strsep */
colon = strchr(token, ':');
if (colon != NULL)
*colon = '\n';
tokens = sscanf(token, "%s\n%u", submodule, &level);
if (colon != NULL)
*colon = ':'; /* set back, for error messages */
if (tokens == 2)
d_submodule_set(d_level, d_level_size,
submodule, level, tag);
else
printk(KERN_ERR "%s: can't parse '%s' as a "
"SUBMODULE:LEVEL (%d tokens)\n",
tag, token, tokens);
}
kfree(params_orig);
}
#endif /* #ifndef __debug__h__ */