From caa751bad444268d756b48ca03d7cceda3430cc8 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 25 Feb 2014 08:30:50 +0100 Subject: 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 --- sound/core/hwdep.c | 14 ++++++++++++++ sound/core/pcm.c | 30 ++++++++++++++++++++++++++---- sound/core/sound.c | 23 +++++++++++++---------- 3 files changed, 53 insertions(+), 14 deletions(-) (limited to 'sound/core') diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c index 8c778659fa03..99f7e8515ba1 100644 --- a/sound/core/hwdep.c +++ b/sound/core/hwdep.c @@ -436,6 +436,20 @@ static int snd_hwdep_dev_register(struct snd_device *device) mutex_unlock(®ister_mutex); return err; } + + if (hwdep->groups) { + struct device *d = snd_get_device(SNDRV_DEVICE_TYPE_HWDEP, + hwdep->card, hwdep->device); + if (d) { + err = sysfs_create_groups(&d->kobj, hwdep->groups); + if (err < 0) + dev_warn(card->dev, + "hwdep %d:%d: cannot create sysfs groups\n", + card->number, hwdep->device); + put_device(d); + } + } + #ifdef CONFIG_SND_OSSEMUL hwdep->ossreg = 0; if (hwdep->oss_type >= 0) { diff --git a/sound/core/pcm.c b/sound/core/pcm.c index 9defdaef520b..43932e8dce66 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -1018,8 +1018,20 @@ static ssize_t show_pcm_class(struct device *dev, return snprintf(buf, PAGE_SIZE, "%s\n", str); } -static struct device_attribute pcm_attrs = - __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); +static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); +static struct attribute *pcm_dev_attrs[] = { + &dev_attr_pcm_class.attr, + NULL +}; + +static struct attribute_group pcm_dev_attr_group = { + .attrs = pcm_dev_attrs, +}; + +static const struct attribute_group *pcm_dev_attr_groups[] = { + &pcm_dev_attr_group, + NULL +}; static int snd_pcm_dev_register(struct snd_device *device) { @@ -1069,8 +1081,18 @@ static int snd_pcm_dev_register(struct snd_device *device) mutex_unlock(®ister_mutex); return err; } - snd_add_device_sysfs_file(devtype, pcm->card, pcm->device, - &pcm_attrs); + + dev = snd_get_device(devtype, pcm->card, pcm->device); + if (dev) { + err = sysfs_create_groups(&dev->kobj, + pcm_dev_attr_groups); + if (err < 0) + dev_warn(dev, + "pcm %d:%d: cannot create sysfs groups\n", + pcm->card->number, pcm->device); + put_device(dev); + } + for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) snd_pcm_timer_init(substream); } 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 /* -- cgit v1.2.3