diff options
Diffstat (limited to 'sound/core/init.c')
| -rw-r--r-- | sound/core/init.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sound/core/init.c b/sound/core/init.c index 2cb7099eb1e1..48d38a79cbbb 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -43,6 +43,40 @@ EXPORT_SYMBOL(snd_cards); static DEFINE_MUTEX(snd_card_mutex); +static char *slots[SNDRV_CARDS]; +module_param_array(slots, charp, NULL, 0444); +MODULE_PARM_DESC(slots, "Module names assigned to the slots."); + +/* return non-zero if the given index is already reserved for another + * module via slots option + */ +static int module_slot_mismatch(struct module *module, int idx) +{ +#ifdef MODULE + char *s1, *s2; + if (!module || !module->name || !slots[idx]) + return 0; + s1 = slots[idx]; + s2 = module->name; + /* compare module name strings + * hyphens are handled as equivalent with underscore + */ + for (;;) { + char c1 = *s1++; + char c2 = *s2++; + if (c1 == '-') + c1 = '_'; + if (c2 == '-') + c2 = '_'; + if (c1 != c2) + return 1; + if (!c1) + break; + } +#endif + return 0; +} + #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int free_flag); EXPORT_SYMBOL(snd_mixer_oss_notify_callback); @@ -115,6 +149,8 @@ struct snd_card *snd_card_new(int idx, const char *xid, for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++) /* idx == -1 == 0xffff means: take any free slot */ if (~snd_cards_lock & idx & 1<<idx2) { + if (module_slot_mismatch(module, idx2)) + continue; idx = idx2; if (idx >= snd_ecards_limit) snd_ecards_limit = idx + 1; |