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author | Takashi Iwai <tiwai@suse.de> | 2006-06-23 12:37:59 (GMT) |
---|---|---|
committer | Jaroslav Kysela <perex@suse.cz> | 2006-09-23 08:36:48 (GMT) |
commit | 746d4a02e68499fc6c1f8d0c43d2271853ade181 (patch) | |
tree | c4a1e9a0e8f5f95a44a3349d9b86490fe837428f /sound/core | |
parent | 42750b04c5baa7c5ffdf0a8be2b9b320efdf069f (diff) | |
download | linux-746d4a02e68499fc6c1f8d0c43d2271853ade181.tar.xz |
[ALSA] Fix disconnection of proc interface
- Add the linked list to each proc entry to enable a single-shot
disconnection (unregister)
- Deprecate snd_info_unregister(), use snd_info_free_entry()
- Removed NULL checks of snd_info_free_entry()
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/core')
-rw-r--r-- | sound/core/hwdep.c | 2 | ||||
-rw-r--r-- | sound/core/info.c | 102 | ||||
-rw-r--r-- | sound/core/info_oss.c | 6 | ||||
-rw-r--r-- | sound/core/init.c | 7 | ||||
-rw-r--r-- | sound/core/oss/mixer_oss.c | 6 | ||||
-rw-r--r-- | sound/core/oss/pcm_oss.c | 8 | ||||
-rw-r--r-- | sound/core/pcm.c | 53 | ||||
-rw-r--r-- | sound/core/pcm_memory.c | 2 | ||||
-rw-r--r-- | sound/core/rawmidi.c | 2 | ||||
-rw-r--r-- | sound/core/seq/oss/seq_oss.c | 3 | ||||
-rw-r--r-- | sound/core/seq/seq_device.c | 2 | ||||
-rw-r--r-- | sound/core/seq/seq_info.c | 6 | ||||
-rw-r--r-- | sound/core/sound.c | 3 | ||||
-rw-r--r-- | sound/core/sound_oss.c | 3 | ||||
-rw-r--r-- | sound/core/timer.c | 2 |
15 files changed, 90 insertions, 117 deletions
diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c index 8bd0dcc..cbd8a63 100644 --- a/sound/core/hwdep.c +++ b/sound/core/hwdep.c @@ -497,7 +497,7 @@ static void __init snd_hwdep_proc_init(void) static void __exit snd_hwdep_proc_done(void) { - snd_info_unregister(snd_hwdep_proc_entry); + snd_info_free_entry(snd_hwdep_proc_entry); } #else /* !CONFIG_PROC_FS */ #define snd_hwdep_proc_init() diff --git a/sound/core/info.c b/sound/core/info.c index 340332c..9663b6b 100644 --- a/sound/core/info.c +++ b/sound/core/info.c @@ -78,6 +78,7 @@ struct snd_info_private_data { static int snd_info_version_init(void); static int snd_info_version_done(void); +static void snd_info_disconnect(struct snd_info_entry *entry); /* resize the proc r/w buffer */ @@ -304,7 +305,7 @@ static int snd_info_entry_open(struct inode *inode, struct file *file) mutex_lock(&info_mutex); p = PDE(inode); entry = p == NULL ? NULL : (struct snd_info_entry *)p->data; - if (entry == NULL || entry->disconnected) { + if (entry == NULL || ! entry->p) { mutex_unlock(&info_mutex); return -ENODEV; } @@ -586,10 +587,10 @@ int __exit snd_info_done(void) snd_info_version_done(); if (snd_proc_root) { #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE) - snd_info_unregister(snd_seq_root); + snd_info_free_entry(snd_seq_root); #endif #ifdef CONFIG_SND_OSSEMUL - snd_info_unregister(snd_oss_root); + snd_info_free_entry(snd_oss_root); #endif snd_remove_proc_entry(&proc_root, snd_proc_root); } @@ -648,17 +649,28 @@ int snd_info_card_register(struct snd_card *card) * de-register the card proc file * called from init.c */ -int snd_info_card_free(struct snd_card *card) +void snd_info_card_disconnect(struct snd_card *card) { - snd_assert(card != NULL, return -ENXIO); + snd_assert(card != NULL, return); + mutex_lock(&info_mutex); if (card->proc_root_link) { snd_remove_proc_entry(snd_proc_root, card->proc_root_link); card->proc_root_link = NULL; } - if (card->proc_root) { - snd_info_unregister(card->proc_root); - card->proc_root = NULL; - } + if (card->proc_root) + snd_info_disconnect(card->proc_root); + mutex_unlock(&info_mutex); +} + +/* + * release the card proc file resources + * called from init.c + */ +int snd_info_card_free(struct snd_card *card) +{ + snd_assert(card != NULL, return -ENXIO); + snd_info_free_entry(card->proc_root); + card->proc_root = NULL; return 0; } @@ -767,6 +779,8 @@ static struct snd_info_entry *snd_info_create_entry(const char *name) entry->mode = S_IFREG | S_IRUGO; entry->content = SNDRV_INFO_CONTENT_TEXT; mutex_init(&entry->access); + INIT_LIST_HEAD(&entry->children); + INIT_LIST_HEAD(&entry->list); return entry; } @@ -819,30 +833,35 @@ struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card, EXPORT_SYMBOL(snd_info_create_card_entry); -static int snd_info_dev_free_entry(struct snd_device *device) +static void snd_info_disconnect(struct snd_info_entry *entry) { - struct snd_info_entry *entry = device->device_data; - snd_info_free_entry(entry); - return 0; -} + struct list_head *p, *n; + struct proc_dir_entry *root; -static int snd_info_dev_register_entry(struct snd_device *device) -{ - struct snd_info_entry *entry = device->device_data; - return snd_info_register(entry); + list_for_each_safe(p, n, &entry->children) { + snd_info_disconnect(list_entry(p, struct snd_info_entry, list)); + } + + if (! entry->p) + return; + list_del_init(&entry->list); + root = entry->parent == NULL ? snd_proc_root : entry->parent->p; + snd_assert(root, return); + snd_remove_proc_entry(root, entry->p); + entry->p = NULL; } -static int snd_info_dev_disconnect_entry(struct snd_device *device) +static int snd_info_dev_free_entry(struct snd_device *device) { struct snd_info_entry *entry = device->device_data; - entry->disconnected = 1; + snd_info_free_entry(entry); return 0; } -static int snd_info_dev_unregister_entry(struct snd_device *device) +static int snd_info_dev_register_entry(struct snd_device *device) { struct snd_info_entry *entry = device->device_data; - return snd_info_unregister(entry); + return snd_info_register(entry); } /** @@ -871,8 +890,7 @@ int snd_card_proc_new(struct snd_card *card, const char *name, static struct snd_device_ops ops = { .dev_free = snd_info_dev_free_entry, .dev_register = snd_info_dev_register_entry, - .dev_disconnect = snd_info_dev_disconnect_entry, - .dev_unregister = snd_info_dev_unregister_entry + /* disconnect is done via snd_info_card_disconnect() */ }; struct snd_info_entry *entry; int err; @@ -901,6 +919,11 @@ void snd_info_free_entry(struct snd_info_entry * entry) { if (entry == NULL) return; + if (entry->p) { + mutex_lock(&info_mutex); + snd_info_disconnect(entry); + mutex_unlock(&info_mutex); + } kfree(entry->name); if (entry->private_free) entry->private_free(entry); @@ -935,38 +958,14 @@ int snd_info_register(struct snd_info_entry * entry) p->size = entry->size; p->data = entry; entry->p = p; + if (entry->parent) + list_add_tail(&entry->list, &entry->parent->children); mutex_unlock(&info_mutex); return 0; } EXPORT_SYMBOL(snd_info_register); -/** - * snd_info_unregister - de-register the info entry - * @entry: the info entry - * - * De-registers the info entry and releases the instance. - * - * Returns zero if successful, or a negative error code on failure. - */ -int snd_info_unregister(struct snd_info_entry * entry) -{ - struct proc_dir_entry *root; - - if (! entry) - return 0; - snd_assert(entry->p != NULL, return -ENXIO); - root = entry->parent == NULL ? snd_proc_root : entry->parent->p; - snd_assert(root, return -ENXIO); - mutex_lock(&info_mutex); - snd_remove_proc_entry(root, entry->p); - mutex_unlock(&info_mutex); - snd_info_free_entry(entry); - return 0; -} - -EXPORT_SYMBOL(snd_info_unregister); - /* */ @@ -999,8 +998,7 @@ static int __init snd_info_version_init(void) static int __exit snd_info_version_done(void) { - if (snd_info_version_entry) - snd_info_unregister(snd_info_version_entry); + snd_info_free_entry(snd_info_version_entry); return 0; } diff --git a/sound/core/info_oss.c b/sound/core/info_oss.c index bb2c40d..3ebc349 100644 --- a/sound/core/info_oss.c +++ b/sound/core/info_oss.c @@ -131,10 +131,8 @@ int snd_info_minor_register(void) int snd_info_minor_unregister(void) { - if (snd_sndstat_proc_entry) { - snd_info_unregister(snd_sndstat_proc_entry); - snd_sndstat_proc_entry = NULL; - } + snd_info_free_entry(snd_sndstat_proc_entry); + snd_sndstat_proc_entry = NULL; return 0; } diff --git a/sound/core/init.c b/sound/core/init.c index 4d92588..1ecb029 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -310,6 +310,7 @@ int snd_card_disconnect(struct snd_card *card) if (err < 0) snd_printk(KERN_ERR "not all devices for card %i can be disconnected\n", card->number); + snd_info_card_disconnect(card); return 0; } @@ -360,7 +361,7 @@ int snd_card_free(struct snd_card *card) } if (card->private_free) card->private_free(card); - snd_info_unregister(card->proc_id); + snd_info_free_entry(card->proc_id); if (snd_info_card_free(card) < 0) { snd_printk(KERN_WARNING "unable to free card info\n"); /* Not fatal error */ @@ -625,9 +626,9 @@ int __init snd_card_info_init(void) int __exit snd_card_info_done(void) { - snd_info_unregister(snd_card_info_entry); + snd_info_free_entry(snd_card_info_entry); #ifdef MODULE - snd_info_unregister(snd_card_module_info_entry); + snd_info_free_entry(snd_card_module_info_entry); #endif return 0; } diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c index 75a9505..00c95de 100644 --- a/sound/core/oss/mixer_oss.c +++ b/sound/core/oss/mixer_oss.c @@ -1193,10 +1193,8 @@ static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer) static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer) { - if (mixer->proc_entry) { - snd_info_unregister(mixer->proc_entry); - mixer->proc_entry = NULL; - } + snd_info_free_entry(mixer->proc_entry); + mixer->proc_entry = NULL; } #else /* !CONFIG_PROC_FS */ #define snd_mixer_oss_proc_init(mix) diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 472fce0..a92b93e 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -2846,11 +2846,9 @@ static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) int stream; for (stream = 0; stream < 2; ++stream) { struct snd_pcm_str *pstr = &pcm->streams[stream]; - if (pstr->oss.proc_entry) { - snd_info_unregister(pstr->oss.proc_entry); - pstr->oss.proc_entry = NULL; - snd_pcm_oss_proc_free_setup_list(pstr); - } + snd_info_free_entry(pstr->oss.proc_entry); + pstr->oss.proc_entry = NULL; + snd_pcm_oss_proc_free_setup_list(pstr); } } #else /* !CONFIG_SND_VERBOSE_PROCFS */ diff --git a/sound/core/pcm.c b/sound/core/pcm.c index 7581edd..b860247 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -494,19 +494,13 @@ static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { #ifdef CONFIG_SND_PCM_XRUN_DEBUG - if (pstr->proc_xrun_debug_entry) { - snd_info_unregister(pstr->proc_xrun_debug_entry); - pstr->proc_xrun_debug_entry = NULL; - } + snd_info_free_entry(pstr->proc_xrun_debug_entry); + pstr->proc_xrun_debug_entry = NULL; #endif - if (pstr->proc_info_entry) { - snd_info_unregister(pstr->proc_info_entry); - pstr->proc_info_entry = NULL; - } - if (pstr->proc_root) { - snd_info_unregister(pstr->proc_root); - pstr->proc_root = NULL; - } + snd_info_free_entry(pstr->proc_info_entry); + pstr->proc_info_entry = NULL; + snd_info_free_entry(pstr->proc_root); + pstr->proc_root = NULL; return 0; } @@ -570,29 +564,19 @@ static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) return 0; } - + static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { - if (substream->proc_info_entry) { - snd_info_unregister(substream->proc_info_entry); - substream->proc_info_entry = NULL; - } - if (substream->proc_hw_params_entry) { - snd_info_unregister(substream->proc_hw_params_entry); - substream->proc_hw_params_entry = NULL; - } - if (substream->proc_sw_params_entry) { - snd_info_unregister(substream->proc_sw_params_entry); - substream->proc_sw_params_entry = NULL; - } - if (substream->proc_status_entry) { - snd_info_unregister(substream->proc_status_entry); - substream->proc_status_entry = NULL; - } - if (substream->proc_root) { - snd_info_unregister(substream->proc_root); - substream->proc_root = NULL; - } + snd_info_free_entry(substream->proc_info_entry); + substream->proc_info_entry = NULL; + snd_info_free_entry(substream->proc_hw_params_entry); + substream->proc_hw_params_entry = NULL; + snd_info_free_entry(substream->proc_sw_params_entry); + substream->proc_sw_params_entry = NULL; + snd_info_free_entry(substream->proc_status_entry); + substream->proc_status_entry = NULL; + snd_info_free_entry(substream->proc_root); + substream->proc_root = NULL; return 0; } #else /* !CONFIG_SND_VERBOSE_PROCFS */ @@ -1090,8 +1074,7 @@ static void snd_pcm_proc_init(void) static void snd_pcm_proc_done(void) { - if (snd_pcm_proc_entry) - snd_info_unregister(snd_pcm_proc_entry); + snd_info_free_entry(snd_pcm_proc_entry); } #else /* !CONFIG_PROC_FS */ diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c index 067d205..be030cb 100644 --- a/sound/core/pcm_memory.c +++ b/sound/core/pcm_memory.c @@ -101,7 +101,7 @@ int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream) { snd_pcm_lib_preallocate_dma_free(substream); #ifdef CONFIG_SND_VERBOSE_PROCFS - snd_info_unregister(substream->proc_prealloc_entry); + snd_info_free_entry(substream->proc_prealloc_entry); substream->proc_prealloc_entry = NULL; #endif return 0; diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 8c15c66..51577c2 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -1599,7 +1599,7 @@ static int snd_rawmidi_dev_unregister(struct snd_device *device) mutex_lock(®ister_mutex); list_del(&rmidi->list); if (rmidi->proc_entry) { - snd_info_unregister(rmidi->proc_entry); + snd_info_free_entry(rmidi->proc_entry); rmidi->proc_entry = NULL; } #ifdef CONFIG_SND_OSSEMUL diff --git a/sound/core/seq/oss/seq_oss.c b/sound/core/seq/oss/seq_oss.c index e723413..92858cf 100644 --- a/sound/core/seq/oss/seq_oss.c +++ b/sound/core/seq/oss/seq_oss.c @@ -303,8 +303,7 @@ register_proc(void) static void unregister_proc(void) { - if (info_entry) - snd_info_unregister(info_entry); + snd_info_free_entry(info_entry); info_entry = NULL; } #endif /* CONFIG_PROC_FS */ diff --git a/sound/core/seq/seq_device.c b/sound/core/seq/seq_device.c index 102ff54..b85954e 100644 --- a/sound/core/seq/seq_device.c +++ b/sound/core/seq/seq_device.c @@ -573,7 +573,7 @@ static void __exit alsa_seq_device_exit(void) { remove_drivers(); #ifdef CONFIG_PROC_FS - snd_info_unregister(info_entry); + snd_info_free_entry(info_entry); #endif if (num_ops) snd_printk(KERN_ERR "drivers not released (%d)\n", num_ops); diff --git a/sound/core/seq/seq_info.c b/sound/core/seq/seq_info.c index 142e9e6..8a7fe5c 100644 --- a/sound/core/seq/seq_info.c +++ b/sound/core/seq/seq_info.c @@ -64,9 +64,9 @@ int __init snd_seq_info_init(void) int __exit snd_seq_info_done(void) { - snd_info_unregister(queues_entry); - snd_info_unregister(clients_entry); - snd_info_unregister(timer_entry); + snd_info_free_entry(queues_entry); + snd_info_free_entry(clients_entry); + snd_info_free_entry(timer_entry); return 0; } #endif diff --git a/sound/core/sound.c b/sound/core/sound.c index 7edd1fc..b4430db 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -387,8 +387,7 @@ int __init snd_minor_info_init(void) int __exit snd_minor_info_done(void) { - if (snd_minor_info_entry) - snd_info_unregister(snd_minor_info_entry); + snd_info_free_entry(snd_minor_info_entry); return 0; } #endif /* CONFIG_PROC_FS */ diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c index 74f0fe5..b2fc40a 100644 --- a/sound/core/sound_oss.c +++ b/sound/core/sound_oss.c @@ -270,8 +270,7 @@ int __init snd_minor_info_oss_init(void) int __exit snd_minor_info_oss_done(void) { - if (snd_minor_info_oss_entry) - snd_info_unregister(snd_minor_info_oss_entry); + snd_info_free_entry(snd_minor_info_oss_entry); return 0; } #endif /* CONFIG_PROC_FS */ diff --git a/sound/core/timer.c b/sound/core/timer.c index 0a984e8..52ecbe1 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1126,7 +1126,7 @@ static void __init snd_timer_proc_init(void) static void __exit snd_timer_proc_done(void) { - snd_info_unregister(snd_timer_proc_entry); + snd_info_free_entry(snd_timer_proc_entry); } #else /* !CONFIG_PROC_FS */ #define snd_timer_proc_init() |