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Diffstat (limited to 'sound/core/hwdep.c')
-rw-r--r--sound/core/hwdep.c91
1 files changed, 42 insertions, 49 deletions
diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index 27d5bf7266f0..b8c0c8c4d126 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -35,8 +35,7 @@ MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Hardware dependent layer");
MODULE_LICENSE("GPL");
-static struct snd_hwdep *snd_hwdep_devices[SNDRV_CARDS * SNDRV_MINOR_HWDEPS];
-
+static LIST_HEAD(snd_hwdep_devices);
static DECLARE_MUTEX(register_mutex);
static int snd_hwdep_free(struct snd_hwdep *hwdep);
@@ -44,9 +43,19 @@ static int snd_hwdep_dev_free(struct snd_device *device);
static int snd_hwdep_dev_register(struct snd_device *device);
static int snd_hwdep_dev_unregister(struct snd_device *device);
-/*
- */
+static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
+{
+ struct list_head *p;
+ struct snd_hwdep *hwdep;
+
+ list_for_each(p, &snd_hwdep_devices) {
+ hwdep = list_entry(p, struct snd_hwdep, list);
+ if (hwdep->card == card && hwdep->device == device)
+ return hwdep;
+ }
+ return NULL;
+}
static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig)
{
@@ -77,34 +86,25 @@ static ssize_t snd_hwdep_write(struct file * file, const char __user *buf,
static int snd_hwdep_open(struct inode *inode, struct file * file)
{
int major = imajor(inode);
- int cardnum;
- int device;
struct snd_hwdep *hw;
int err;
wait_queue_t wait;
if (major == snd_major) {
- cardnum = SNDRV_MINOR_CARD(iminor(inode));
- device = SNDRV_MINOR_DEVICE(iminor(inode)) - SNDRV_MINOR_HWDEP;
+ hw = snd_lookup_minor_data(iminor(inode),
+ SNDRV_DEVICE_TYPE_HWDEP);
#ifdef CONFIG_SND_OSSEMUL
} else if (major == SOUND_MAJOR) {
- cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode));
- device = 0;
+ hw = snd_lookup_oss_minor_data(iminor(inode),
+ SNDRV_OSS_DEVICE_TYPE_DMFM);
#endif
} else
return -ENXIO;
- cardnum %= SNDRV_CARDS;
- device %= SNDRV_MINOR_HWDEPS;
- hw = snd_hwdep_devices[(cardnum * SNDRV_MINOR_HWDEPS) + device];
if (hw == NULL)
return -ENODEV;
if (!hw->ops.open)
return -ENXIO;
-#ifdef CONFIG_SND_OSSEMUL
- if (major == SOUND_MAJOR && hw->oss_type < 0)
- return -ENXIO;
-#endif
if (!try_module_get(hw->card->module))
return -EFAULT;
@@ -265,9 +265,6 @@ static int snd_hwdep_control_ioctl(struct snd_card *card,
struct snd_ctl_file * control,
unsigned int cmd, unsigned long arg)
{
- unsigned int tmp;
-
- tmp = card->number * SNDRV_MINOR_HWDEPS;
switch (cmd) {
case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
{
@@ -275,14 +272,16 @@ static int snd_hwdep_control_ioctl(struct snd_card *card,
if (get_user(device, (int __user *)arg))
return -EFAULT;
+ down(&register_mutex);
device = device < 0 ? 0 : device + 1;
while (device < SNDRV_MINOR_HWDEPS) {
- if (snd_hwdep_devices[tmp + device])
+ if (snd_hwdep_search(card, device))
break;
device++;
}
if (device >= SNDRV_MINOR_HWDEPS)
device = -1;
+ up(&register_mutex);
if (put_user(device, (int __user *)arg))
return -EFAULT;
return 0;
@@ -290,17 +289,19 @@ static int snd_hwdep_control_ioctl(struct snd_card *card,
case SNDRV_CTL_IOCTL_HWDEP_INFO:
{
struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
- int device;
+ int device, err;
struct snd_hwdep *hwdep;
if (get_user(device, &info->device))
return -EFAULT;
- if (device < 0 || device >= SNDRV_MINOR_HWDEPS)
- return -ENXIO;
- hwdep = snd_hwdep_devices[tmp + device];
- if (hwdep == NULL)
- return -ENXIO;
- return snd_hwdep_info(hwdep, info);
+ down(&register_mutex);
+ hwdep = snd_hwdep_search(card, device);
+ if (hwdep)
+ err = snd_hwdep_info(hwdep, info);
+ else
+ err = -ENXIO;
+ up(&register_mutex);
+ return err;
}
}
return -ENOIOCTLCMD;
@@ -397,23 +398,22 @@ static int snd_hwdep_dev_free(struct snd_device *device)
static int snd_hwdep_dev_register(struct snd_device *device)
{
struct snd_hwdep *hwdep = device->device_data;
- int idx, err;
+ int err;
char name[32];
down(&register_mutex);
- idx = (hwdep->card->number * SNDRV_MINOR_HWDEPS) + hwdep->device;
- if (snd_hwdep_devices[idx]) {
+ if (snd_hwdep_search(hwdep->card, hwdep->device)) {
up(&register_mutex);
return -EBUSY;
}
- snd_hwdep_devices[idx] = hwdep;
+ list_add_tail(&hwdep->list, &snd_hwdep_devices);
sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
hwdep->card, hwdep->device,
- &snd_hwdep_f_ops, name)) < 0) {
+ &snd_hwdep_f_ops, hwdep, name)) < 0) {
snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
hwdep->card->number, hwdep->device);
- snd_hwdep_devices[idx] = NULL;
+ list_del(&hwdep->list);
up(&register_mutex);
return err;
}
@@ -425,7 +425,7 @@ static int snd_hwdep_dev_register(struct snd_device *device)
} else {
if (snd_register_oss_device(hwdep->oss_type,
hwdep->card, hwdep->device,
- &snd_hwdep_f_ops,
+ &snd_hwdep_f_ops, hwdep,
hwdep->oss_dev) < 0) {
snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
hwdep->card->number, hwdep->device);
@@ -441,12 +441,10 @@ static int snd_hwdep_dev_register(struct snd_device *device)
static int snd_hwdep_dev_unregister(struct snd_device *device)
{
struct snd_hwdep *hwdep = device->device_data;
- int idx;
snd_assert(hwdep != NULL, return -ENXIO);
down(&register_mutex);
- idx = (hwdep->card->number * SNDRV_MINOR_HWDEPS) + hwdep->device;
- if (snd_hwdep_devices[idx] != hwdep) {
+ if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
up(&register_mutex);
return -EINVAL;
}
@@ -455,7 +453,7 @@ static int snd_hwdep_dev_unregister(struct snd_device *device)
snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
#endif
snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
- snd_hwdep_devices[idx] = NULL;
+ list_del(&hwdep->list);
up(&register_mutex);
return snd_hwdep_free(hwdep);
}
@@ -467,18 +465,14 @@ static int snd_hwdep_dev_unregister(struct snd_device *device)
static void snd_hwdep_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
- int idx;
+ struct list_head *p;
struct snd_hwdep *hwdep;
down(&register_mutex);
- for (idx = 0; idx < SNDRV_CARDS * SNDRV_MINOR_HWDEPS; idx++) {
- hwdep = snd_hwdep_devices[idx];
- if (hwdep == NULL)
- continue;
+ list_for_each(p, &snd_hwdep_devices) {
+ hwdep = list_entry(p, struct snd_hwdep, list);
snd_iprintf(buffer, "%02i-%02i: %s\n",
- idx / SNDRV_MINOR_HWDEPS,
- idx % SNDRV_MINOR_HWDEPS,
- hwdep->name);
+ hwdep->card->number, hwdep->device, hwdep->name);
}
up(&register_mutex);
}
@@ -493,9 +487,8 @@ static int __init alsa_hwdep_init(void)
{
struct snd_info_entry *entry;
- memset(snd_hwdep_devices, 0, sizeof(snd_hwdep_devices));
if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
- entry->c.text.read_size = 512;
+ entry->c.text.read_size = PAGE_SIZE;
entry->c.text.read = snd_hwdep_proc_read;
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 20:23:54 +0000