diff options
Diffstat (limited to 'sound/core/init.c')
| -rw-r--r-- | sound/core/init.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/sound/core/init.c b/sound/core/init.c index a4cc6b155ae..4a431e3ea3a 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -36,7 +36,7 @@ static DEFINE_SPINLOCK(shutdown_lock); static LIST_HEAD(shutdown_files); -static struct file_operations snd_shutdown_f_ops; +static const struct file_operations snd_shutdown_f_ops; static unsigned int snd_cards_lock; /* locked for registering/using */ struct snd_card *snd_cards[SNDRV_CARDS]; @@ -114,22 +114,28 @@ struct snd_card *snd_card_new(int idx, const char *xid, 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<<idx2) { idx = idx2; if (idx >= snd_ecards_limit) snd_ecards_limit = idx + 1; break; } - } else if (idx < snd_ecards_limit) { - if (snd_cards_lock & (1 << idx)) - err = -ENODEV; /* invalid */ - } else if (idx < SNDRV_CARDS) - snd_ecards_limit = idx + 1; /* increase the limit */ - else - err = -ENODEV; + } else { + if (idx < snd_ecards_limit) { + if (snd_cards_lock & (1 << idx)) + err = -EBUSY; /* invalid */ + } else { + if (idx < SNDRV_CARDS) + snd_ecards_limit = idx + 1; /* increase the limit */ + else + err = -ENODEV; + } + } if (idx < 0 || err < 0) { mutex_unlock(&snd_card_mutex); - snd_printk(KERN_ERR "cannot find the slot for index %d (range 0-%i)\n", idx, snd_ecards_limit - 1); + 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 */ @@ -238,7 +244,7 @@ static int snd_disconnect_fasync(int fd, struct file *file, int on) return -ENODEV; } -static struct file_operations snd_shutdown_f_ops = +static const struct file_operations snd_shutdown_f_ops = { .owner = THIS_MODULE, .llseek = snd_disconnect_llseek, |