summaryrefslogtreecommitdiffstats
path: root/sound/core
diff options
context:
space:
mode:
authorTakashi Iwai <tiwai@suse.de>2012-03-18 18:22:33 +0100
committerTakashi Iwai <tiwai@suse.de>2012-03-18 18:22:33 +0100
commit44c76a960a62fcc46cbcaa0a22a34e666a729329 (patch)
treed3887c858f6adffb6714da3cdc0059f93588344c /sound/core
parentdbf117cbb9c89991727d42e3161e68b868a1b6ae (diff)
parentc6b76d1f02e2ab1109d8549877a3a24c6a2b4587 (diff)
downloadlinux-44c76a960a62fcc46cbcaa0a22a34e666a729329.tar.bz2
Merge branch 'topic/misc' into for-linus
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/control.c2
-rw-r--r--sound/core/init.c169
-rw-r--r--sound/core/misc.c2
-rw-r--r--sound/core/pcm_lib.c3
-rw-r--r--sound/core/pcm_native.c15
5 files changed, 114 insertions, 77 deletions
diff --git a/sound/core/control.c b/sound/core/control.c
index 819a5c579a39..2487a6bb1c54 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1313,7 +1313,7 @@ static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file,
err = -EPERM;
goto __kctl_end;
}
- err = kctl->tlv.c(kctl, op_flag, tlv.length, _tlv->tlv);
+ err = kctl->tlv.c(kctl, op_flag, tlv.length, _tlv->tlv);
if (err > 0) {
up_read(&card->controls_rwsem);
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_TLV, &kctl->id);
diff --git a/sound/core/init.c b/sound/core/init.c
index 3ac49b1b7cb8..068cf08d3ffb 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -480,74 +480,104 @@ int snd_card_free(struct snd_card *card)
EXPORT_SYMBOL(snd_card_free);
-static void snd_card_set_id_no_lock(struct snd_card *card, const char *nid)
+/* retrieve the last word of shortname or longname */
+static const char *retrieve_id_from_card_name(const char *name)
{
- int i, len, idx_flag = 0, loops = SNDRV_CARDS;
- const char *spos, *src;
- char *id;
-
- if (nid == NULL) {
- id = card->shortname;
- spos = src = id;
- while (*id != '\0') {
- if (*id == ' ')
- spos = id + 1;
- id++;
- }
- } else {
- spos = src = nid;
+ const char *spos = name;
+
+ while (*name) {
+ if (isspace(*name) && isalnum(name[1]))
+ spos = name + 1;
+ name++;
}
- id = card->id;
- while (*spos != '\0' && !isalnum(*spos))
- spos++;
- if (isdigit(*spos))
- *id++ = isalpha(src[0]) ? src[0] : 'D';
- while (*spos != '\0' && (size_t)(id - card->id) < sizeof(card->id) - 1) {
- if (isalnum(*spos))
- *id++ = *spos;
- spos++;
+ return spos;
+}
+
+/* return true if the given id string doesn't conflict any other card ids */
+static bool card_id_ok(struct snd_card *card, const char *id)
+{
+ int i;
+ if (!snd_info_check_reserved_words(id))
+ return false;
+ for (i = 0; i < snd_ecards_limit; i++) {
+ if (snd_cards[i] && snd_cards[i] != card &&
+ !strcmp(snd_cards[i]->id, id))
+ return false;
}
- *id = '\0';
+ return true;
+}
- id = card->id;
+/* copy to card->id only with valid letters from nid */
+static void copy_valid_id_string(struct snd_card *card, const char *src,
+ const char *nid)
+{
+ char *id = card->id;
+
+ while (*nid && !isalnum(*nid))
+ nid++;
+ if (isdigit(*nid))
+ *id++ = isalpha(*src) ? *src : 'D';
+ while (*nid && (size_t)(id - card->id) < sizeof(card->id) - 1) {
+ if (isalnum(*nid))
+ *id++ = *nid;
+ nid++;
+ }
+ *id = 0;
+}
+
+/* Set card->id from the given string
+ * If the string conflicts with other ids, add a suffix to make it unique.
+ */
+static void snd_card_set_id_no_lock(struct snd_card *card, const char *src,
+ const char *nid)
+{
+ int len, loops;
+ bool with_suffix;
+ bool is_default = false;
+ char *id;
- if (*id == '\0')
+ copy_valid_id_string(card, src, nid);
+ id = card->id;
+
+ again:
+ /* use "Default" for obviously invalid strings
+ * ("card" conflicts with proc directories)
+ */
+ if (!*id || !strncmp(id, "card", 4)) {
strcpy(id, "Default");
+ is_default = true;
+ }
- while (1) {
- if (loops-- == 0) {
- snd_printk(KERN_ERR "unable to set card id (%s)\n", id);
- strcpy(card->id, card->proc_root->name);
- return;
- }
- if (!snd_info_check_reserved_words(id))
- goto __change;
- for (i = 0; i < snd_ecards_limit; i++) {
- if (snd_cards[i] && !strcmp(snd_cards[i]->id, id))
- goto __change;
- }
- break;
+ with_suffix = false;
+ for (loops = 0; loops < SNDRV_CARDS; loops++) {
+ if (card_id_ok(card, id))
+ return; /* OK */
- __change:
len = strlen(id);
- if (idx_flag) {
- if (id[len-1] != '9')
- id[len-1]++;
- else
- id[len-1] = 'A';
- } else if ((size_t)len <= sizeof(card->id) - 3) {
- strcat(id, "_1");
- idx_flag++;
+ if (!with_suffix) {
+ /* add the "_X" suffix */
+ char *spos = id + len;
+ if (len > sizeof(card->id) - 3)
+ spos = id + sizeof(card->id) - 3;
+ strcpy(spos, "_1");
+ with_suffix = true;
} else {
- spos = id + len - 2;
- if ((size_t)len <= sizeof(card->id) - 2)
- spos++;
- *(char *)spos++ = '_';
- *(char *)spos++ = '1';
- *(char *)spos++ = '\0';
- idx_flag++;
+ /* modify the existing suffix */
+ if (id[len - 1] != '9')
+ id[len - 1]++;
+ else
+ id[len - 1] = 'A';
}
}
+ /* fallback to the default id */
+ if (!is_default) {
+ *id = 0;
+ goto again;
+ }
+ /* last resort... */
+ snd_printk(KERN_ERR "unable to set card id (%s)\n", id);
+ if (card->proc_root->name)
+ strcpy(card->id, card->proc_root->name);
}
/**
@@ -564,7 +594,7 @@ void snd_card_set_id(struct snd_card *card, const char *nid)
if (card->id[0] != '\0')
return;
mutex_lock(&snd_card_mutex);
- snd_card_set_id_no_lock(card, nid);
+ snd_card_set_id_no_lock(card, nid, nid);
mutex_unlock(&snd_card_mutex);
}
EXPORT_SYMBOL(snd_card_set_id);
@@ -596,22 +626,12 @@ card_id_store_attr(struct device *dev, struct device_attribute *attr,
memcpy(buf1, buf, copy);
buf1[copy] = '\0';
mutex_lock(&snd_card_mutex);
- if (!snd_info_check_reserved_words(buf1)) {
- __exist:
+ if (!card_id_ok(NULL, buf1)) {
mutex_unlock(&snd_card_mutex);
return -EEXIST;
}
- for (idx = 0; idx < snd_ecards_limit; idx++) {
- if (snd_cards[idx] && !strcmp(snd_cards[idx]->id, buf1)) {
- if (card == snd_cards[idx])
- goto __ok;
- else
- goto __exist;
- }
- }
strcpy(card->id, buf1);
snd_info_card_id_change(card);
-__ok:
mutex_unlock(&snd_card_mutex);
return count;
@@ -665,7 +685,18 @@ int snd_card_register(struct snd_card *card)
mutex_unlock(&snd_card_mutex);
return 0;
}
- snd_card_set_id_no_lock(card, card->id[0] == '\0' ? NULL : card->id);
+ if (*card->id) {
+ /* make a unique id name from the given string */
+ char tmpid[sizeof(card->id)];
+ memcpy(tmpid, card->id, sizeof(card->id));
+ snd_card_set_id_no_lock(card, tmpid, tmpid);
+ } else {
+ /* create an id from either shortname or longname */
+ const char *src;
+ src = *card->shortname ? card->shortname : card->longname;
+ snd_card_set_id_no_lock(card, src,
+ retrieve_id_from_card_name(src));
+ }
snd_cards[card->number] = card;
mutex_unlock(&snd_card_mutex);
init_info_for_card(card);
diff --git a/sound/core/misc.c b/sound/core/misc.c
index 465f0ce772cb..768167925409 100644
--- a/sound/core/misc.c
+++ b/sound/core/misc.c
@@ -72,7 +72,7 @@ void __snd_printk(unsigned int level, const char *path, int line,
char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
#endif
-#ifdef CONFIG_SND_DEBUG
+#ifdef CONFIG_SND_DEBUG
if (debug < level)
return;
#endif
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 3420bd3da5d7..4d18941178e6 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -1029,7 +1029,8 @@ static int snd_interval_ratden(struct snd_interval *i,
*
* Returns non-zero if the value is changed, zero if not changed.
*/
-int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask)
+int snd_interval_list(struct snd_interval *i, unsigned int count,
+ const unsigned int *list, unsigned int mask)
{
unsigned int k;
struct snd_interval list_range;
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 25ed9fe41b89..3fe99e644eb8 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1586,12 +1586,18 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
struct file *file;
struct snd_pcm_file *pcm_file;
struct snd_pcm_substream *substream1;
+ struct snd_pcm_group *group;
file = snd_pcm_file_fd(fd);
if (!file)
return -EBADFD;
pcm_file = file->private_data;
substream1 = pcm_file->substream;
+ group = kmalloc(sizeof(*group), GFP_KERNEL);
+ if (!group) {
+ res = -ENOMEM;
+ goto _nolock;
+ }
down_write(&snd_pcm_link_rwsem);
write_lock_irq(&snd_pcm_link_rwlock);
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
@@ -1604,11 +1610,7 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
goto _end;
}
if (!snd_pcm_stream_linked(substream)) {
- substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
- if (substream->group == NULL) {
- res = -ENOMEM;
- goto _end;
- }
+ substream->group = group;
spin_lock_init(&substream->group->lock);
INIT_LIST_HEAD(&substream->group->substreams);
list_add_tail(&substream->link_list, &substream->group->substreams);
@@ -1620,7 +1622,10 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
_end:
write_unlock_irq(&snd_pcm_link_rwlock);
up_write(&snd_pcm_link_rwsem);
+ _nolock:
fput(file);
+ if (res < 0)
+ kfree(group);
return res;
}