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authorTakashi Iwai <tiwai@suse.de>2010-04-13 13:24:34 +0400
committerTakashi Iwai <tiwai@suse.de>2010-04-13 13:24:34 +0400
commit067e4a5d23422c9e9a0787b7e18fa2457226d999 (patch)
tree550ab9dc96efe513b2ffeafbff6662f8caaa68ef /sound/core
parent0d0fb0f9c5fddef4a10242fe3337f00f528a3099 (diff)
parent4cf19b848f92641eeb2585949a09eedec57fb53a (diff)
downloadlinux-067e4a5d23422c9e9a0787b7e18fa2457226d999.tar.xz
Merge branch 'topic/bkl' into topic/core-cleanup
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/info.c4
-rw-r--r--sound/core/pcm_native.c9
-rw-r--r--sound/core/sound.c73
3 files changed, 42 insertions, 44 deletions
diff --git a/sound/core/info.c b/sound/core/info.c
index cc4a53d4b7f8..ff968be81678 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -168,7 +168,7 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig)
data = file->private_data;
entry = data->entry;
- lock_kernel();
+ mutex_lock(&entry->access);
switch (entry->content) {
case SNDRV_INFO_CONTENT_TEXT:
switch (orig) {
@@ -197,7 +197,7 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig)
}
ret = -ENXIO;
out:
- unlock_kernel();
+ mutex_unlock(&entry->access);
return ret;
}
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 872887624030..cadba3087768 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3303,18 +3303,13 @@ static int snd_pcm_fasync(int fd, struct file * file, int on)
struct snd_pcm_file * pcm_file;
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
- int err = -ENXIO;
- lock_kernel();
pcm_file = file->private_data;
substream = pcm_file->substream;
if (PCM_RUNTIME_CHECK(substream))
- goto out;
+ return -ENXIO;
runtime = substream->runtime;
- err = fasync_helper(fd, file, on, &runtime->fasync);
-out:
- unlock_kernel();
- return err;
+ return fasync_helper(fd, file, on, &runtime->fasync);
}
/*
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 563d1967a0ad..ac42af42b787 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -120,7 +120,29 @@ void *snd_lookup_minor_data(unsigned int minor, int type)
EXPORT_SYMBOL(snd_lookup_minor_data);
-static int __snd_open(struct inode *inode, struct file *file)
+#ifdef CONFIG_MODULES
+static struct snd_minor *autoload_device(unsigned int minor)
+{
+ int dev;
+ mutex_unlock(&sound_mutex); /* release lock temporarily */
+ dev = SNDRV_MINOR_DEVICE(minor);
+ if (dev == SNDRV_MINOR_CONTROL) {
+ /* /dev/aloadC? */
+ int card = SNDRV_MINOR_CARD(minor);
+ if (snd_cards[card] == NULL)
+ snd_request_card(card);
+ } else if (dev == SNDRV_MINOR_GLOBAL) {
+ /* /dev/aloadSEQ */
+ snd_request_other(minor);
+ }
+ mutex_lock(&sound_mutex); /* reacuire lock */
+ return snd_minors[minor];
+}
+#else /* !CONFIG_MODULES */
+#define autoload_device(minor) NULL
+#endif /* CONFIG_MODULES */
+
+static int snd_open(struct inode *inode, struct file *file)
{
unsigned int minor = iminor(inode);
struct snd_minor *mptr = NULL;
@@ -129,55 +151,36 @@ static int __snd_open(struct inode *inode, struct file *file)
if (minor >= ARRAY_SIZE(snd_minors))
return -ENODEV;
+ mutex_lock(&sound_mutex);
mptr = snd_minors[minor];
if (mptr == NULL) {
-#ifdef CONFIG_MODULES
- int dev = SNDRV_MINOR_DEVICE(minor);
- if (dev == SNDRV_MINOR_CONTROL) {
- /* /dev/aloadC? */
- int card = SNDRV_MINOR_CARD(minor);
- if (snd_cards[card] == NULL)
- snd_request_card(card);
- } else if (dev == SNDRV_MINOR_GLOBAL) {
- /* /dev/aloadSEQ */
- snd_request_other(minor);
- }
-#ifndef CONFIG_SND_DYNAMIC_MINORS
- /* /dev/snd/{controlC?,seq} */
- mptr = snd_minors[minor];
- if (mptr == NULL)
-#endif
-#endif
+ mptr = autoload_device(minor);
+ if (!mptr) {
+ mutex_unlock(&sound_mutex);
return -ENODEV;
+ }
}
old_fops = file->f_op;
file->f_op = fops_get(mptr->f_ops);
if (file->f_op == NULL) {
file->f_op = old_fops;
- return -ENODEV;
+ err = -ENODEV;
}
- if (file->f_op->open)
+ mutex_unlock(&sound_mutex);
+ if (err < 0)
+ return err;
+
+ if (file->f_op->open) {
err = file->f_op->open(inode, file);
- if (err) {
- fops_put(file->f_op);
- file->f_op = fops_get(old_fops);
+ if (err) {
+ fops_put(file->f_op);
+ file->f_op = fops_get(old_fops);
+ }
}
fops_put(old_fops);
return err;
}
-
-/* BKL pushdown: nasty #ifdef avoidance wrapper */
-static int snd_open(struct inode *inode, struct file *file)
-{
- int ret;
-
- lock_kernel();
- ret = __snd_open(inode, file);
- unlock_kernel();
- return ret;
-}
-
static const struct file_operations snd_fops =
{
.owner = THIS_MODULE,