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authorTakashi Iwai <tiwai@suse.de>2014-02-25 08:30:50 +0100
committerTakashi Iwai <tiwai@suse.de>2014-02-25 12:12:49 +0100
commitcaa751bad444268d756b48ca03d7cceda3430cc8 (patch)
tree1bca8a78c67dc2d54e6a83c3ec81dbcc302676d0 /sound/core/sound.c
parentd01a838c86b60fdce4fbc9e51d5d14d6cfe0a902 (diff)
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ALSA: Create sysfs attribute files via groups
Instead of calling each time device_create_file(), create the groups of sysfs attribute files at once in a normal way. Add a new helper function, snd_get_device(), to return the associated device object, so that we can handle the sysfs addition locally. Since the sysfs file addition is done differently now, snd_add_device_sysfs_file() helper function is removed. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/sound.c')
-rw-r--r--sound/core/sound.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 60ab9b1f44b9..38ad1a0dd3f7 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -355,22 +355,25 @@ int snd_unregister_device(int type, struct snd_card *card, int dev)
EXPORT_SYMBOL(snd_unregister_device);
-int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,
- struct device_attribute *attr)
+/* get the assigned device to the given type and device number;
+ * the caller needs to release it via put_device() after using it
+ */
+struct device *snd_get_device(int type, struct snd_card *card, int dev)
{
- int minor, ret = -EINVAL;
- struct device *d;
+ int minor;
+ struct device *d = NULL;
mutex_lock(&sound_mutex);
minor = find_snd_minor(type, card, dev);
- if (minor >= 0 && (d = snd_minors[minor]->dev) != NULL)
- ret = device_create_file(d, attr);
+ if (minor >= 0) {
+ d = snd_minors[minor]->dev;
+ if (d)
+ get_device(d);
+ }
mutex_unlock(&sound_mutex);
- return ret;
-
+ return d;
}
-
-EXPORT_SYMBOL(snd_add_device_sysfs_file);
+EXPORT_SYMBOL(snd_get_device);
#ifdef CONFIG_PROC_FS
/*