seq_file is _the_ standard interface for simple text proc files. Though, we still need to support the binary proc files and the text file write, and also we need to manage the device disconnection gracefully. Thus this patch just replaces the text file read code with seq_file while keeping the rest intact.

snd_iprintf() helper function is now a macro to expand itself to seq_printf() to be compatible with the existing code. The seq_file object is stored to the unused entry->rbuffer->buffer pointer.

When the output size is expected to be large (greater than PAGE_SIZE), the driver should set entry->size field beforehand. Then the given size will be preallocated and the multiple show calls can be avoided.

Signed-off-by: Takashi Iwai tiwai@suse.de --- include/sound/info.h | 16 +- sound/core/info.c | 569 ++++++++++++++++++++++----------------------------- 2 files changed, 261 insertions(+), 324 deletions(-)

diff --git a/include/sound/info.h b/include/sound/info.h index 9ca1a493d370..ff8962ebece5 100644 --- a/include/sound/info.h +++ b/include/sound/info.h @@ -23,6 +23,7 @@ */

#include <linux/poll.h> +#include <linux/seq_file.h>

/* buffer for information */ struct snd_info_buffer { @@ -110,8 +111,18 @@ void snd_card_info_read_oss(struct snd_info_buffer *buffer); static inline void snd_card_info_read_oss(struct snd_info_buffer *buffer) {} #endif

-__printf(2, 3) -int snd_iprintf(struct snd_info_buffer *buffer, const char *fmt, ...); +/** + * snd_iprintf - printf on the procfs buffer + * @buf: the procfs buffer + * @fmt: the printf format + * + * Outputs the string on the procfs buffer just like printf(). + * + * Return: zero for success, or a negative error code. + */ +#define snd_iprintf(buf, fmt, args...) \ + seq_printf((struct seq_file *)(buf)->buffer, fmt, ##args) + int snd_info_init(void); int snd_info_done(void);

@@ -175,7 +186,6 @@ static inline int snd_card_proc_new(struct snd_card *card, const char *name, static inline void snd_info_set_text_ops(struct snd_info_entry *entry __attribute__((unused)), void *private_data, void (*read)(struct snd_info_entry *, struct snd_info_buffer *)) {} - static inline int snd_info_check_reserved_words(const char *str) { return 1; }

#endif diff --git a/sound/core/info.c b/sound/core/info.c index 9f404e965ea2..8c1275f0fcbd 100644 --- a/sound/core/info.c +++ b/sound/core/info.c @@ -81,66 +81,6 @@ static int snd_info_version_init(void); static int snd_info_version_done(void); static void snd_info_disconnect(struct snd_info_entry *entry);

- -/* resize the proc r/w buffer */ -static int resize_info_buffer(struct snd_info_buffer *buffer, - unsigned int nsize) -{ - char *nbuf; - - nsize = PAGE_ALIGN(nsize); - nbuf = krealloc(buffer->buffer, nsize, GFP_KERNEL | __GFP_ZERO); - if (! nbuf) - return -ENOMEM; - - buffer->buffer = nbuf; - buffer->len = nsize; - return 0; -} - -/** - * snd_iprintf - printf on the procfs buffer - * @buffer: the procfs buffer - * @fmt: the printf format - * - * Outputs the string on the procfs buffer just like printf(). - * - * Return: The size of output string, or a negative error code. - */ -int snd_iprintf(struct snd_info_buffer *buffer, const char *fmt, ...) -{ - va_list args; - int len, res; - int err = 0; - - might_sleep(); - if (buffer->stop || buffer->error) - return 0; - len = buffer->len - buffer->size; - va_start(args, fmt); - for (;;) { - va_list ap; - va_copy(ap, args); - res = vsnprintf(buffer->buffer + buffer->curr, len, fmt, ap); - va_end(ap); - if (res < len) - break; - err = resize_info_buffer(buffer, buffer->len + PAGE_SIZE); - if (err < 0) - break; - len = buffer->len - buffer->size; - } - va_end(args); - - if (err < 0) - return err; - buffer->curr += res; - buffer->size += res; - return res; -} - -EXPORT_SYMBOL(snd_iprintf); - /*

*/ @@ -153,6 +93,37 @@ EXPORT_SYMBOL(snd_seq_root); struct snd_info_entry *snd_oss_root; #endif

+static int alloc_info_private(struct snd_info_entry *entry, + struct snd_info_private_data **ret) +{ + struct snd_info_private_data *data; + + if (!entry || !entry->p) + return -ENODEV; + if (!try_module_get(entry->module)) + return -EFAULT; + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + module_put(entry->module); + return -ENOMEM; + } + data->entry = entry; + *ret = data; + return 0; +} + +static bool valid_pos(loff_t pos, size_t count) +{ + if (pos < 0 || (long) pos != pos || (ssize_t) count < 0) + return false; + if ((unsigned long) pos + (unsigned long) count < (unsigned long) pos) + return false; + return true; +} + +/* + * file ops for binary proc files + */ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig) { struct snd_info_private_data *data; @@ -162,17 +133,14 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig) data = file->private_data; entry = data->entry; mutex_lock(&entry->access); - if (entry->content == SNDRV_INFO_CONTENT_DATA && - entry->c.ops->llseek) { + if (entry->c.ops->llseek) { offset = entry->c.ops->llseek(entry, data->file_private_data, file, offset, orig); goto out; } - if (entry->content == SNDRV_INFO_CONTENT_DATA) - size = entry->size; - else - size = 0; + + size = entry->size; switch (orig) { case SEEK_SET: break; @@ -201,45 +169,20 @@ static loff_t snd_info_entry_llseek(struct file *file, loff_t offset, int orig) static ssize_t snd_info_entry_read(struct file *file, char __user *buffer, size_t count, loff_t * offset) { - struct snd_info_private_data *data; - struct snd_info_entry *entry; - struct snd_info_buffer *buf; - size_t size = 0; + struct snd_info_private_data *data = file->private_data; + struct snd_info_entry *entry = data->entry; + size_t size; loff_t pos;

- data = file->private_data; - if (snd_BUG_ON(!data)) - return -ENXIO; pos = *offset; - if (pos < 0 || (long) pos != pos || (ssize_t) count < 0) - return -EIO; - if ((unsigned long) pos + (unsigned long) count < (unsigned long) pos) + if (!valid_pos(pos, count)) return -EIO; - entry = data->entry; - switch (entry->content) { - case SNDRV_INFO_CONTENT_TEXT: - buf = data->rbuffer; - if (buf == NULL) - return -EIO; - if (pos >= buf->size) - return 0; - size = buf->size - pos; - size = min(count, size); - if (copy_to_user(buffer, buf->buffer + pos, size)) - return -EFAULT; - break; - case SNDRV_INFO_CONTENT_DATA: - if (pos >= entry->size) - return 0; - if (entry->c.ops->read) { - size = entry->size - pos; - size = min(count, size); - size = entry->c.ops->read(entry, - data->file_private_data, - file, buffer, size, pos); - } - break; - } + if (pos >= entry->size) + return 0; + size = entry->size - pos; + size = min(count, size); + size = entry->c.ops->read(entry, data->file_private_data, + file, buffer, size, pos); if ((ssize_t) size > 0) *offset = pos + size; return size; @@ -248,280 +191,259 @@ static ssize_t snd_info_entry_read(struct file *file, char __user *buffer, static ssize_t snd_info_entry_write(struct file *file, const char __user *buffer, size_t count, loff_t * offset) { - struct snd_info_private_data *data; - struct snd_info_entry *entry; - struct snd_info_buffer *buf; + struct snd_info_private_data *data = file->private_data; + struct snd_info_entry *entry = data->entry; ssize_t size = 0; loff_t pos;

- data = file->private_data; - if (snd_BUG_ON(!data)) - return -ENXIO; - entry = data->entry; pos = *offset; - if (pos < 0 || (long) pos != pos || (ssize_t) count < 0) + if (!valid_pos(pos, count)) return -EIO; - if ((unsigned long) pos + (unsigned long) count < (unsigned long) pos) - return -EIO; - switch (entry->content) { - case SNDRV_INFO_CONTENT_TEXT: - buf = data->wbuffer; - if (buf == NULL) - return -EIO; - mutex_lock(&entry->access); - if (pos + count >= buf->len) { - if (resize_info_buffer(buf, pos + count)) { - mutex_unlock(&entry->access); - return -ENOMEM; - } - } - if (copy_from_user(buf->buffer + pos, buffer, count)) { - mutex_unlock(&entry->access); - return -EFAULT; - } - buf->size = pos + count; - mutex_unlock(&entry->access); - size = count; - break; - case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->write && count > 0) { - size_t maxsize = entry->size - pos; - count = min(count, maxsize); - size = entry->c.ops->write(entry, - data->file_private_data, - file, buffer, count, pos); - } - break; + if (count > 0) { + size_t maxsize = entry->size - pos; + count = min(count, maxsize); + size = entry->c.ops->write(entry, data->file_private_data, + file, buffer, count, pos); } - if ((ssize_t) size > 0) + if (size > 0) *offset = pos + size; return size; }

-static int snd_info_entry_open(struct inode *inode, struct file *file) +static unsigned int snd_info_entry_poll(struct file *file, poll_table *wait) +{ + struct snd_info_private_data *data = file->private_data; + struct snd_info_entry *entry = data->entry; + unsigned int mask = 0; + + if (entry->c.ops->poll) + return entry->c.ops->poll(entry, + data->file_private_data, + file, wait); + if (entry->c.ops->read) + mask |= POLLIN | POLLRDNORM; + if (entry->c.ops->write) + mask |= POLLOUT | POLLWRNORM; + return mask; +} + +static long snd_info_entry_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + struct snd_info_private_data *data = file->private_data; + struct snd_info_entry *entry = data->entry; + + if (!entry->c.ops->ioctl) + return -ENOTTY; + return entry->c.ops->ioctl(entry, data->file_private_data, + file, cmd, arg); +} + +static int snd_info_entry_mmap(struct file *file, struct vm_area_struct *vma) { + struct inode *inode = file_inode(file); + struct snd_info_private_data *data; struct snd_info_entry *entry; + + data = file->private_data; + if (data == NULL) + return 0; + entry = data->entry; + if (!entry->c.ops->mmap) + return -ENXIO; + return entry->c.ops->mmap(entry, data->file_private_data, + inode, file, vma); +} + +static int snd_info_entry_open(struct inode *inode, struct file *file) +{ + struct snd_info_entry *entry = PDE_DATA(inode); struct snd_info_private_data *data; - struct snd_info_buffer *buffer; int mode, err;

mutex_lock(&info_mutex); - entry = PDE_DATA(inode); - if (entry == NULL || ! entry->p) { - mutex_unlock(&info_mutex); - return -ENODEV; - } - if (!try_module_get(entry->module)) { - err = -EFAULT; - goto __error1; - } + err = alloc_info_private(entry, &data); + if (err < 0) + goto unlock; + mode = file->f_flags & O_ACCMODE; - if (mode == O_RDONLY || mode == O_RDWR) { - if ((entry->content == SNDRV_INFO_CONTENT_DATA && - entry->c.ops->read == NULL)) { - err = -ENODEV; - goto __error; - } - } - if (mode == O_WRONLY || mode == O_RDWR) { - if ((entry->content == SNDRV_INFO_CONTENT_DATA && - entry->c.ops->write == NULL)) { - err = -ENODEV; - goto __error; - } + if (((mode == O_RDONLY || mode == O_RDWR) && !entry->c.ops->read) || + ((mode == O_WRONLY || mode == O_RDWR) && !entry->c.ops->write)) { + err = -ENODEV; + goto error; } - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (data == NULL) { - err = -ENOMEM; - goto __error; - } - data->entry = entry; - switch (entry->content) { - case SNDRV_INFO_CONTENT_TEXT: - if (mode == O_RDONLY || mode == O_RDWR) { - buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); - if (buffer == NULL) - goto __nomem; - data->rbuffer = buffer; - buffer->len = PAGE_SIZE; - buffer->buffer = kzalloc(buffer->len, GFP_KERNEL); - if (buffer->buffer == NULL) - goto __nomem; - } - if (mode == O_WRONLY || mode == O_RDWR) { - buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); - if (buffer == NULL) - goto __nomem; - data->wbuffer = buffer; - buffer->len = PAGE_SIZE; - buffer->buffer = kmalloc(buffer->len, GFP_KERNEL); - if (buffer->buffer == NULL) - goto __nomem; - } - break; - case SNDRV_INFO_CONTENT_DATA: /* data */ - if (entry->c.ops->open) { - if ((err = entry->c.ops->open(entry, mode, - &data->file_private_data)) < 0) { - kfree(data); - goto __error; - } - } - break; + + if (entry->c.ops->open) { + err = entry->c.ops->open(entry, mode, &data->file_private_data); + if (err < 0) + goto error; } + file->private_data = data; mutex_unlock(&info_mutex); - if (entry->content == SNDRV_INFO_CONTENT_TEXT && - (mode == O_RDONLY || mode == O_RDWR)) { - if (entry->c.text.read) { - mutex_lock(&entry->access); - entry->c.text.read(entry, data->rbuffer); - mutex_unlock(&entry->access); - } - } return 0;

- __nomem: - if (data->rbuffer) { - kfree(data->rbuffer->buffer); - kfree(data->rbuffer); - } - if (data->wbuffer) { - kfree(data->wbuffer->buffer); - kfree(data->wbuffer); - } + error: kfree(data); - err = -ENOMEM; - __error: module_put(entry->module); - __error1: + unlock: mutex_unlock(&info_mutex); return err; }

static int snd_info_entry_release(struct inode *inode, struct file *file) { - struct snd_info_entry *entry; - struct snd_info_private_data *data; - int mode; + struct snd_info_private_data *data = file->private_data; + struct snd_info_entry *entry = data->entry;

- mode = file->f_flags & O_ACCMODE; - data = file->private_data; - entry = data->entry; - switch (entry->content) { - case SNDRV_INFO_CONTENT_TEXT: - if (data->rbuffer) { - kfree(data->rbuffer->buffer); - kfree(data->rbuffer); - } - if (data->wbuffer) { - if (entry->c.text.write) { - entry->c.text.write(entry, data->wbuffer); - if (data->wbuffer->error) { - if (entry->card) - dev_warn(entry->card->dev, "info: data write error to %s (%i)\n", - entry->name, - data->wbuffer->error); - else - pr_warn("ALSA: info: data write error to %s (%i)\n", - entry->name, - data->wbuffer->error); - } - } - kfree(data->wbuffer->buffer); - kfree(data->wbuffer); - } - break; - case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->release) - entry->c.ops->release(entry, mode, - data->file_private_data); - break; - } + if (entry->c.ops->release) + entry->c.ops->release(entry, file->f_flags & O_ACCMODE, + data->file_private_data); module_put(entry->module); kfree(data); return 0; }

-static unsigned int snd_info_entry_poll(struct file *file, poll_table * wait) +static const struct file_operations snd_info_entry_operations = { - struct snd_info_private_data *data; - struct snd_info_entry *entry; - unsigned int mask; + .owner = THIS_MODULE, + .llseek = snd_info_entry_llseek, + .read = snd_info_entry_read, + .write = snd_info_entry_write, + .poll = snd_info_entry_poll, + .unlocked_ioctl = snd_info_entry_ioctl, + .mmap = snd_info_entry_mmap, + .open = snd_info_entry_open, + .release = snd_info_entry_release, +};

- data = file->private_data; - if (data == NULL) - return 0; - entry = data->entry; - mask = 0; - switch (entry->content) { - case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->poll) - return entry->c.ops->poll(entry, - data->file_private_data, - file, wait); - if (entry->c.ops->read) - mask |= POLLIN | POLLRDNORM; - if (entry->c.ops->write) - mask |= POLLOUT | POLLWRNORM; - break; +/* + * file ops for text proc files + */ +static ssize_t snd_info_text_entry_write(struct file *file, + const char __user *buffer, + size_t count, loff_t *offset) +{ + struct seq_file *m = file->private_data; + struct snd_info_private_data *data = m->private; + struct snd_info_entry *entry = data->entry; + struct snd_info_buffer *buf; + loff_t pos; + size_t next; + int err = 0; + + pos = *offset; + if (!valid_pos(pos, count)) + return -EIO; + next = pos + count; + mutex_lock(&entry->access); + buf = data->wbuffer; + if (!buf) { + data->wbuffer = buf = kzalloc(sizeof(*buf), GFP_KERNEL); + if (!buf) { + err = -ENOMEM; + goto error; + } } - return mask; + if (next > buf->len) { + char *nbuf = krealloc(buf->buffer, PAGE_ALIGN(next), + GFP_KERNEL | __GFP_ZERO); + if (!nbuf) { + err = -ENOMEM; + goto error; + } + buf->buffer = nbuf; + buf->len = PAGE_ALIGN(next); + } + if (copy_from_user(buf->buffer + pos, buffer, count)) { + err = -EFAULT; + goto error; + } + buf->size = next; + error: + mutex_unlock(&entry->access); + if (err < 0) + return err; + *offset = next; + return count; }

-static long snd_info_entry_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) +static int snd_info_seq_show(struct seq_file *seq, void *p) { - struct snd_info_private_data *data; - struct snd_info_entry *entry; + struct snd_info_private_data *data = seq->private; + struct snd_info_entry *entry = data->entry;

- data = file->private_data; - if (data == NULL) - return 0; - entry = data->entry; - switch (entry->content) { - case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->ioctl) - return entry->c.ops->ioctl(entry, - data->file_private_data, - file, cmd, arg); - break; + if (entry->c.text.read) { + data->rbuffer->buffer = (char *)seq; /* XXX hack! */ + entry->c.text.read(entry, data->rbuffer); } - return -ENOTTY; + return 0; }

-static int snd_info_entry_mmap(struct file *file, struct vm_area_struct *vma) +static int snd_info_text_entry_open(struct inode *inode, struct file *file) { - struct inode *inode = file_inode(file); + struct snd_info_entry *entry = PDE_DATA(inode); struct snd_info_private_data *data; - struct snd_info_entry *entry; + int err;

- data = file->private_data; - if (data == NULL) - return 0; - entry = data->entry; - switch (entry->content) { - case SNDRV_INFO_CONTENT_DATA: - if (entry->c.ops->mmap) - return entry->c.ops->mmap(entry, - data->file_private_data, - inode, file, vma); - break; + mutex_lock(&info_mutex); + err = alloc_info_private(entry, &data); + if (err < 0) + goto unlock; + + data->rbuffer = kzalloc(sizeof(*data->rbuffer), GFP_KERNEL); + if (!data->rbuffer) { + err = -ENOMEM; + goto error; + } + if (entry->size) + err = single_open_size(file, snd_info_seq_show, data, + entry->size); + else + err = single_open(file, snd_info_seq_show, data); + if (err < 0) + goto error; + mutex_unlock(&info_mutex); + return 0; + + error: + kfree(data->rbuffer); + kfree(data); + module_put(entry->module); + unlock: + mutex_unlock(&info_mutex); + return err; +} + +static int snd_info_text_entry_release(struct inode *inode, struct file *file) +{ + struct seq_file *m = file->private_data; + struct snd_info_private_data *data = m->private; + struct snd_info_entry *entry = data->entry; + + if (data->wbuffer && entry->c.text.write) + entry->c.text.write(entry, data->wbuffer); + + single_release(inode, file); + kfree(data->rbuffer); + if (data->wbuffer) { + kfree(data->wbuffer->buffer); + kfree(data->wbuffer); } - return -ENXIO; + + module_put(entry->module); + kfree(data); + return 0; }

-static const struct file_operations snd_info_entry_operations = +static const struct file_operations snd_info_text_entry_ops = { .owner = THIS_MODULE, - .llseek = snd_info_entry_llseek, - .read = snd_info_entry_read, - .write = snd_info_entry_write, - .poll = snd_info_entry_poll, - .unlocked_ioctl = snd_info_entry_ioctl, - .mmap = snd_info_entry_mmap, - .open = snd_info_entry_open, - .release = snd_info_entry_release, + .open = snd_info_text_entry_open, + .release = snd_info_text_entry_release, + .write = snd_info_text_entry_write, + .llseek = seq_lseek, + .read = seq_read, };

int __init snd_info_init(void) @@ -955,8 +877,13 @@ int snd_info_register(struct snd_info_entry * entry) return -ENOMEM; } } else { + const struct file_operations *ops; + if (entry->content == SNDRV_INFO_CONTENT_DATA) + ops = &snd_info_entry_operations; + else + ops = &snd_info_text_entry_ops; p = proc_create_data(entry->name, entry->mode, root, - &snd_info_entry_operations, entry); + ops, entry); if (!p) { mutex_unlock(&info_mutex); return -ENOMEM;

This patch changes the way to managing the resource release of proc files: namely, let snd_info_free_entry() freeing the whole children. Then we can drop the snd_device_*() management and snd_card_proc_new() can be merely a wrapper to snd_info_create_card_entry().

Signed-off-by: Takashi Iwai tiwai@suse.de --- include/sound/info.h | 9 ++++-- sound/core/info.c | 79 +++++++++------------------------------------------- 2 files changed, 20 insertions(+), 68 deletions(-)

diff --git a/include/sound/info.h b/include/sound/info.h index ff8962ebece5..3e2fda3c75ee 100644 --- a/include/sound/info.h +++ b/include/sound/info.h @@ -24,6 +24,7 @@

#include <linux/poll.h> #include <linux/seq_file.h> +#include <sound/core.h>

/* buffer for information */ struct snd_info_buffer { @@ -146,8 +147,12 @@ void snd_info_card_id_change(struct snd_card *card); int snd_info_register(struct snd_info_entry *entry);

/* for card drivers */ -int snd_card_proc_new(struct snd_card *card, const char *name, - struct snd_info_entry **entryp); +static inline int snd_card_proc_new(struct snd_card *card, const char *name, + struct snd_info_entry **entryp) +{ + *entryp = snd_info_create_card_entry(card, name, card->proc_root); + return *entryp ? 0 : -ENOMEM; +}

static inline void snd_info_set_text_ops(struct snd_info_entry *entry, void *private_data, diff --git a/sound/core/info.c b/sound/core/info.c index 9c6db5c24da7..96451a130199 100644 --- a/sound/core/info.c +++ b/sound/core/info.c @@ -760,92 +760,39 @@ EXPORT_SYMBOL(snd_info_create_card_entry);

static void snd_info_disconnect(struct snd_info_entry *entry) { - struct list_head *p, *n; + struct snd_info_entry *p, *n;

- list_for_each_safe(p, n, &entry->children) { - snd_info_disconnect(list_entry(p, struct snd_info_entry, list)); - } - - if (! entry->p) + if (!entry->p) return; + list_for_each_entry_safe(p, n, &entry->children, list) + snd_info_disconnect(p); list_del_init(&entry->list); proc_remove(entry->p); entry->p = NULL; }

-static int snd_info_dev_free_entry(struct snd_device *device) -{ - struct snd_info_entry *entry = device->device_data; - snd_info_free_entry(entry); - return 0; -} - -static int snd_info_dev_register_entry(struct snd_device *device) -{ - struct snd_info_entry *entry = device->device_data; - return snd_info_register(entry); -} - -/** - * snd_card_proc_new - create an info entry for the given card - * @card: the card instance - * @name: the file name - * @entryp: the pointer to store the new info entry - * - * Creates a new info entry and assigns it to the given card. - * Unlike snd_info_create_card_entry(), this function registers the - * info entry as an ALSA device component, so that it can be - * unregistered/released without explicit call. - * Also, you don't have to register this entry via snd_info_register(), - * since this will be registered by snd_card_register() automatically. - * - * The parent is assumed as card->proc_root. - * - * For releasing this entry, use snd_device_free() instead of - * snd_info_free_entry(). - * - * Return: Zero if successful, or a negative error code on failure. - */ -int snd_card_proc_new(struct snd_card *card, const char *name, - struct snd_info_entry **entryp) -{ - static struct snd_device_ops ops = { - .dev_free = snd_info_dev_free_entry, - .dev_register = snd_info_dev_register_entry, - /* disconnect is done via snd_info_card_disconnect() */ - }; - struct snd_info_entry *entry; - int err; - - entry = snd_info_create_card_entry(card, name, card->proc_root); - if (! entry) - return -ENOMEM; - if ((err = snd_device_new(card, SNDRV_DEV_INFO, entry, &ops)) < 0) { - snd_info_free_entry(entry); - return err; - } - if (entryp) - *entryp = entry; - return 0; -} - -EXPORT_SYMBOL(snd_card_proc_new); - /** * snd_info_free_entry - release the info entry * @entry: the info entry * - * Releases the info entry. Don't call this after registered. + * Releases the info entry. */ void snd_info_free_entry(struct snd_info_entry * entry) { - if (entry == NULL) + struct snd_info_entry *p, *n; + + if (!entry) return; if (entry->p) { mutex_lock(&info_mutex); snd_info_disconnect(entry); mutex_unlock(&info_mutex); } + + /* free all children at first */ + list_for_each_entry_safe(p, n, &entry->children, list) + snd_info_free_entry(p); + kfree(entry->name); if (entry->private_free) entry->private_free(entry);

Since each proc entry is freed automatically by the parent, we don't have to take care of its life cycle any longer. This allows us to reduce a few more lines of codes.

Signed-off-by: Takashi Iwai tiwai@suse.de --- include/sound/core.h | 4 ---- sound/core/info.c | 3 --- sound/core/init.c | 17 ----------------- sound/core/sound.c | 10 ---------- sound/core/sound_oss.c | 14 +------------- 5 files changed, 1 insertion(+), 47 deletions(-)

diff --git a/include/sound/core.h b/include/sound/core.h index b12931f513f4..cdfecafff0f4 100644 --- a/include/sound/core.h +++ b/include/sound/core.h @@ -224,16 +224,13 @@ void *snd_lookup_oss_minor_data(unsigned int minor, int type); #endif

int snd_minor_info_init(void); -int snd_minor_info_done(void);

/* sound_oss.c */

#ifdef CONFIG_SND_OSSEMUL int snd_minor_info_oss_init(void); -int snd_minor_info_oss_done(void); #else static inline int snd_minor_info_oss_init(void) { return 0; } -static inline int snd_minor_info_oss_done(void) { return 0; } #endif

/* memory.c */ @@ -262,7 +259,6 @@ int snd_card_free_when_closed(struct snd_card *card); void snd_card_set_id(struct snd_card *card, const char *id); int snd_card_register(struct snd_card *card); int snd_card_info_init(void); -int snd_card_info_done(void); int snd_card_add_dev_attr(struct snd_card *card, const struct attribute_group *group); int snd_component_add(struct snd_card *card, const char *component); diff --git a/sound/core/info.c b/sound/core/info.c index 55c626eeb061..339f90a3aa29 100644 --- a/sound/core/info.c +++ b/sound/core/info.c @@ -495,9 +495,6 @@ int __init snd_info_init(void)

int __exit snd_info_done(void) { - snd_card_info_done(); - snd_minor_info_oss_done(); - snd_minor_info_done(); snd_info_free_entry(snd_proc_root); return 0; } diff --git a/sound/core/init.c b/sound/core/init.c index 04734e047bfe..0af34fac0499 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -783,8 +783,6 @@ int snd_card_register(struct snd_card *card) EXPORT_SYMBOL(snd_card_register);

#ifdef CONFIG_PROC_FS -static struct snd_info_entry *snd_card_info_entry; - static void snd_card_info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { @@ -810,7 +808,6 @@ static void snd_card_info_read(struct snd_info_entry *entry, }

#ifdef CONFIG_SND_OSSEMUL - void snd_card_info_read_oss(struct snd_info_buffer *buffer) { int idx, count; @@ -832,7 +829,6 @@ void snd_card_info_read_oss(struct snd_info_buffer *buffer) #endif

#ifdef MODULE -static struct snd_info_entry *snd_card_module_info_entry; static void snd_card_module_info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { @@ -861,7 +857,6 @@ int __init snd_card_info_init(void) snd_info_free_entry(entry); return -ENOMEM; } - snd_card_info_entry = entry;

#ifdef MODULE entry = snd_info_create_module_entry(THIS_MODULE, "modules", NULL); @@ -869,23 +864,11 @@ int __init snd_card_info_init(void) entry->c.text.read = snd_card_module_info_read; if (snd_info_register(entry) < 0) snd_info_free_entry(entry); - else - snd_card_module_info_entry = entry; } #endif

return 0; } - -int __exit snd_card_info_done(void) -{ - snd_info_free_entry(snd_card_info_entry); -#ifdef MODULE - snd_info_free_entry(snd_card_module_info_entry); -#endif - return 0; -} - #endif /* CONFIG_PROC_FS */

/** diff --git a/sound/core/sound.c b/sound/core/sound.c index 5fc93d00572a..d584944c8fe5 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -334,9 +334,6 @@ EXPORT_SYMBOL(snd_unregister_device); /* * INFO PART */ - -static struct snd_info_entry *snd_minor_info_entry; - static const char *snd_device_type_name(int type) { switch (type) { @@ -396,13 +393,6 @@ int __init snd_minor_info_init(void) entry = NULL; } } - snd_minor_info_entry = entry; - return 0; -} - -int __exit snd_minor_info_done(void) -{ - snd_info_free_entry(snd_minor_info_entry); return 0; } #endif /* CONFIG_PROC_FS */ diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c index 573a65eb2b79..5fc3c6534225 100644 --- a/sound/core/sound_oss.c +++ b/sound/core/sound_oss.c @@ -214,9 +214,6 @@ EXPORT_SYMBOL(snd_unregister_oss_device); */

#ifdef CONFIG_PROC_FS - -static struct snd_info_entry *snd_minor_info_oss_entry; - static const char *snd_oss_device_type_name(int type) { switch (type) { @@ -265,18 +262,9 @@ int __init snd_minor_info_oss_init(void) entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); if (entry) { entry->c.text.read = snd_minor_info_oss_read; - if (snd_info_register(entry) < 0) { + if (snd_info_register(entry) < 0) snd_info_free_entry(entry); - entry = NULL; - } } - snd_minor_info_oss_entry = entry; - return 0; -} - -int __exit snd_minor_info_oss_done(void) -{ - snd_info_free_entry(snd_minor_info_oss_entry); return 0; } #endif /* CONFIG_PROC_FS */

Minor cleanups of Makefile to build some codes conditionally so that a few ifdefs can be reduced.

Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/Makefile | 8 ++++++-- sound/core/info.c | 8 -------- sound/core/info_oss.c | 4 ---- sound/core/seq/Makefile | 3 ++- sound/core/seq/seq_info.c | 2 -- sound/core/sound_oss.c | 8 -------- 6 files changed, 8 insertions(+), 25 deletions(-)

diff --git a/sound/core/Makefile b/sound/core/Makefile index 4daf2f58261c..ae1d32b084fd 100644 --- a/sound/core/Makefile +++ b/sound/core/Makefile @@ -3,9 +3,13 @@ # Copyright (c) 1999,2001 by Jaroslav Kysela perex@perex.cz #

-snd-y := sound.o init.o memory.o info.o control.o misc.o device.o +snd-y := sound.o init.o memory.o control.o misc.o device.o +ifneq ($(CONFIG_PROC_FS),) +snd-y += info.o +snd-$(CONFIG_SND_OSSEMUL) += info_oss.o +endif snd-$(CONFIG_ISA_DMA_API) += isadma.o -snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o info_oss.o +snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o snd-$(CONFIG_SND_VMASTER) += vmaster.o snd-$(CONFIG_SND_KCTL_JACK) += ctljack.o snd-$(CONFIG_SND_JACK) += jack.o diff --git a/sound/core/info.c b/sound/core/info.c index 4169062fabf5..f8bdd9b6f322 100644 --- a/sound/core/info.c +++ b/sound/core/info.c @@ -33,12 +33,6 @@ #include <linux/mutex.h> #include <stdarg.h>

-/* - * - */ - -#ifdef CONFIG_PROC_FS - int snd_info_check_reserved_words(const char *str) { static char *reserved[] = @@ -850,5 +844,3 @@ static int __init snd_info_version_init(void) entry->c.text.read = snd_info_version_read; return snd_info_register(entry); /* freed in error path */ } - -#endif /* CONFIG_PROC_FS */ diff --git a/sound/core/info_oss.c b/sound/core/info_oss.c index 83c29dbff9c0..bd4d2c6233c2 100644 --- a/sound/core/info_oss.c +++ b/sound/core/info_oss.c @@ -29,8 +29,6 @@ #include <linux/utsname.h> #include <linux/mutex.h>

-#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS) - /* * OSS compatible part */ @@ -134,5 +132,3 @@ int snd_info_minor_unregister(void) snd_sndstat_proc_entry = NULL; return 0; } - -#endif /* CONFIG_SND_OSSEMUL */ diff --git a/sound/core/seq/Makefile b/sound/core/seq/Makefile index 941f64a853eb..b29ffe835205 100644 --- a/sound/core/seq/Makefile +++ b/sound/core/seq/Makefile @@ -6,7 +6,8 @@ snd-seq-device-objs := seq_device.o snd-seq-objs := seq.o seq_lock.o seq_clientmgr.o seq_memory.o seq_queue.o \ seq_fifo.o seq_prioq.o seq_timer.o \ - seq_system.o seq_ports.o seq_info.o + seq_system.o seq_ports.o +snd-seq-$(CONFIG_PROC_FS) += seq_info.o snd-seq-midi-objs := seq_midi.o snd-seq-midi-emul-objs := seq_midi_emul.o snd-seq-midi-event-objs := seq_midi_event.o diff --git a/sound/core/seq/seq_info.c b/sound/core/seq/seq_info.c index d3c65e780e9e..97015447b9b3 100644 --- a/sound/core/seq/seq_info.c +++ b/sound/core/seq/seq_info.c @@ -27,7 +27,6 @@ #include "seq_clientmgr.h" #include "seq_timer.h"

-#ifdef CONFIG_PROC_FS static struct snd_info_entry *queues_entry; static struct snd_info_entry *clients_entry; static struct snd_info_entry *timer_entry; @@ -80,4 +79,3 @@ int __exit snd_seq_info_done(void) free_info_entries(); return 0; } -#endif diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c index 56d2f409f1ef..86e2d91dd375 100644 --- a/sound/core/sound_oss.c +++ b/sound/core/sound_oss.c @@ -19,12 +19,6 @@ * */

-#ifdef CONFIG_SND_OSSEMUL - -#if !IS_ENABLED(CONFIG_SOUND) -#error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel." -#endif - #include <linux/init.h> #include <linux/export.h> #include <linux/slab.h> @@ -266,5 +260,3 @@ int __init snd_minor_info_oss_init(void) return snd_info_register(entry); /* freed in error path */ } #endif /* CONFIG_PROC_FS */ - -#endif /* CONFIG_SND_OSSEMUL */