X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=sound%2Fcore%2Finit.c;h=5c254d498ae094d452bb0c85a143f468eaedde0a;hb=17489c058e8c63ab5ebdc67ab52ca70d1bc270b1;hp=f2fe357371860a4bee7b3c98e66f6ad00568f726;hpb=334d0dd8b660557608142f0f77abc6812b48f08b;p=pandora-kernel.git diff --git a/sound/core/init.c b/sound/core/init.c index f2fe35737186..5c254d498ae0 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -1,6 +1,6 @@ /* * Initialization routines - * Copyright (c) by Jaroslav Kysela + * Copyright (c) by Jaroslav Kysela * * * This program is free software; you can redistribute it and/or modify @@ -19,7 +19,6 @@ * */ -#include #include #include #include @@ -43,6 +42,47 @@ 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 reserved for the given + * module via slots option + */ +static int module_slot_match(struct module *module, int idx) +{ + int match = 1; +#ifdef MODULE + const char *s1, *s2; + + if (!module || !module->name || !slots[idx]) + return 0; + + s1 = module->name; + s2 = slots[idx]; + if (*s2 == '!') { + match = 0; /* negative match */ + s2++; + } + /* 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 !match; + if (!c1) + break; + } +#endif /* MODULE */ + return match; +} + #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); @@ -96,7 +136,7 @@ struct snd_card *snd_card_new(int idx, const char *xid, struct module *module, int extra_size) { struct snd_card *card; - int err; + int err, idx2; if (extra_size < 0) extra_size = 0; @@ -111,33 +151,41 @@ struct snd_card *snd_card_new(int idx, const char *xid, err = 0; mutex_lock(&snd_card_mutex); if (idx < 0) { - int idx2; for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++) /* idx == -1 == 0xffff means: take any free slot */ if (~snd_cards_lock & idx & 1<= snd_ecards_limit) - snd_ecards_limit = idx + 1; - break; + if (module_slot_match(module, idx2)) { + idx = idx2; + break; + } + } + } + if (idx < 0) { + for (idx2 = 0; idx2 < SNDRV_CARDS; idx2++) + /* idx == -1 == 0xffff means: take any free slot */ + if (~snd_cards_lock & idx & 1<= SNDRV_CARDS) + err = -ENODEV; + if (err < 0) { mutex_unlock(&snd_card_mutex); snd_printk(KERN_ERR "cannot find the slot for index %d (range 0-%i), error: %d\n", idx, snd_ecards_limit - 1, err); goto __error; } snd_cards_lock |= 1 << idx; /* lock it */ + if (idx >= snd_ecards_limit) + snd_ecards_limit = idx + 1; /* increase the limit */ mutex_unlock(&snd_card_mutex); card->number = idx; card->module = module; @@ -219,7 +267,7 @@ static int snd_disconnect_release(struct inode *inode, struct file *file) if (likely(df)) return df->disconnected_f_op->release(inode, file); - panic("%s(%p, %p) failed!", __FUNCTION__, inode, file); + panic("%s(%p, %p) failed!", __func__, inode, file); } static unsigned int snd_disconnect_poll(struct file * file, poll_table * wait) @@ -276,6 +324,9 @@ int snd_card_disconnect(struct snd_card *card) struct file *file; int err; + if (!card) + return -EINVAL; + spin_lock(&card->files_lock); if (card->shutdown) { spin_unlock(&card->files_lock); @@ -287,6 +338,7 @@ int snd_card_disconnect(struct snd_card *card) /* phase 1: disable fops (user space) operations for ALSA API */ mutex_lock(&snd_card_mutex); snd_cards[card->number] = NULL; + snd_cards_lock &= ~(1 << card->number); mutex_unlock(&snd_card_mutex); /* phase 2: replace file->f_op with special dummy operations */ @@ -304,8 +356,8 @@ int snd_card_disconnect(struct snd_card *card) list_add(&mfile->shutdown_list, &shutdown_files); spin_unlock(&shutdown_lock); - fops_get(&snd_shutdown_f_ops); mfile->file->f_op = &snd_shutdown_f_ops; + fops_get(mfile->file->f_op); mfile = mfile->next; } @@ -325,6 +377,15 @@ int snd_card_disconnect(struct snd_card *card) snd_printk(KERN_ERR "not all devices for card %i can be disconnected\n", card->number); snd_info_card_disconnect(card); +#ifndef CONFIG_SYSFS_DEPRECATED + if (card->card_dev) { + device_unregister(card->card_dev); + card->card_dev = NULL; + } +#endif +#ifdef CONFIG_PM + wake_up(&card->power_sleep); +#endif return 0; } @@ -366,33 +427,14 @@ static int snd_card_do_free(struct snd_card *card) snd_printk(KERN_WARNING "unable to free card info\n"); /* Not fatal error */ } -#ifndef CONFIG_SYSFS_DEPRECATED - if (card->card_dev) - device_unregister(card->card_dev); -#endif kfree(card); return 0; } -static int snd_card_free_prepare(struct snd_card *card) -{ - if (card == NULL) - return -EINVAL; - (void) snd_card_disconnect(card); - mutex_lock(&snd_card_mutex); - snd_cards[card->number] = NULL; - snd_cards_lock &= ~(1 << card->number); - mutex_unlock(&snd_card_mutex); -#ifdef CONFIG_PM - wake_up(&card->power_sleep); -#endif - return 0; -} - int snd_card_free_when_closed(struct snd_card *card) { int free_now = 0; - int ret = snd_card_free_prepare(card); + int ret = snd_card_disconnect(card); if (ret) return ret; @@ -412,7 +454,7 @@ EXPORT_SYMBOL(snd_card_free_when_closed); int snd_card_free(struct snd_card *card) { - int ret = snd_card_free_prepare(card); + int ret = snd_card_disconnect(card); if (ret) return ret;