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authorInaky Perez-Gonzalez <inaky@linux.intel.com>2009-09-02 18:36:05 -0400
committerInaky Perez-Gonzalez <inaky@linux.intel.com>2009-10-19 02:55:50 -0400
commit4c2b1a11646bf74e2926ce8b13a21884adc1e05c (patch)
tree59cd5b59b21969264c6833b567b828484a6d76ed /include
parent4dc1bf074e4db5aa281a7b82ceebb24df98922d2 (diff)
wimax: allow specifying debug levels as command line option
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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/wimax/debug.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/include/linux/wimax/debug.h b/include/linux/wimax/debug.h
index c703e0340423..db8096e88533 100644
--- a/include/linux/wimax/debug.h
+++ b/include/linux/wimax/debug.h
@@ -450,4 +450,76 @@ do { \
450}) 450})
451 451
452 452
453static inline
454void d_submodule_set(struct d_level *d_level, size_t d_level_size,
455 const char *submodule, u8 level, const char *tag)
456{
457 struct d_level *itr, *top;
458 int index = -1;
459
460 for (itr = d_level, top = itr + d_level_size; itr < top; itr++) {
461 index++;
462 if (itr->name == NULL) {
463 printk(KERN_ERR "%s: itr->name NULL?? (%p, #%d)\n",
464 tag, itr, index);
465 continue;
466 }
467 if (!strcmp(itr->name, submodule)) {
468 itr->level = level;
469 return;
470 }
471 }
472 printk(KERN_ERR "%s: unknown submodule %s\n", tag, submodule);
473}
474
475
476/**
477 * d_parse_params - Parse a string with debug parameters from the
478 * command line
479 *
480 * @d_level: level structure (D_LEVEL)
481 * @d_level_size: number of items in the level structure
482 * (D_LEVEL_SIZE).
483 * @_params: string with the parameters; this is a space (not tab!)
484 * separated list of NAME:VALUE, where value is the debug level
485 * and NAME is the name of the submodule.
486 * @tag: string for error messages (example: MODULE.ARGNAME).
487 */
488static inline
489void d_parse_params(struct d_level *d_level, size_t d_level_size,
490 const char *_params, const char *tag)
491{
492 char submodule[130], *params, *params_orig, *token, *colon;
493 unsigned level, tokens;
494
495 if (_params == NULL)
496 return;
497 params_orig = kstrdup(_params, GFP_KERNEL);
498 params = params_orig;
499 while (1) {
500 token = strsep(&params, " ");
501 if (token == NULL)
502 break;
503 if (*token == '\0') /* eat joint spaces */
504 continue;
505 /* kernel's sscanf %s eats until whitespace, so we
506 * replace : by \n so it doesn't get eaten later by
507 * strsep */
508 colon = strchr(token, ':');
509 if (colon != NULL)
510 *colon = '\n';
511 tokens = sscanf(token, "%s\n%u", submodule, &level);
512 if (colon != NULL)
513 *colon = ':'; /* set back, for error messages */
514 if (tokens == 2)
515 d_submodule_set(d_level, d_level_size,
516 submodule, level, tag);
517 else
518 printk(KERN_ERR "%s: can't parse '%s' as a "
519 "SUBMODULE:LEVEL (%d tokens)\n",
520 tag, token, tokens);
521 }
522 kfree(params_orig);
523}
524
453#endif /* #ifndef __debug__h__ */ 525#endif /* #ifndef __debug__h__ */