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-rw-r--r--include/sound/minors.h2
-rw-r--r--include/sound/pcm.h4
-rw-r--r--sound/core/oss/pcm_oss.c10
-rw-r--r--sound/core/pcm.c50
-rw-r--r--sound/core/sound.c2
5 files changed, 45 insertions, 23 deletions
diff --git a/include/sound/minors.h b/include/sound/minors.h
index 46bcd2023ed..a81798ab73e 100644
--- a/include/sound/minors.h
+++ b/include/sound/minors.h
@@ -21,6 +21,8 @@
*
*/
+#define SNDRV_OS_MINORS 256
+
#define SNDRV_MINOR_DEVICES 32
#define SNDRV_MINOR_CARD(minor) ((minor) >> 5)
#define SNDRV_MINOR_DEVICE(minor) ((minor) & 0x001f)
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 51d58ccda2d..bfc096ac82e 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -84,8 +84,6 @@ struct snd_pcm_ops {
*
*/
-#define SNDRV_PCM_DEVICES 8
-
#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
@@ -416,7 +414,7 @@ struct snd_pcm_str {
struct snd_pcm {
struct snd_card *card;
struct list_head list;
- unsigned int device; /* device number */
+ int device; /* device number */
unsigned int info_flags;
unsigned short dev_class;
unsigned short dev_subclass;
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 4c601b192dd..4ccd761a5f4 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -2947,7 +2947,7 @@ static void register_oss_dsp(struct snd_pcm *pcm, int index)
static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
{
pcm->oss.reg = 0;
- if (dsp_map[pcm->card->number] == (int)pcm->device) {
+ if (dsp_map[pcm->card->number] == pcm->device) {
char name[128];
int duplex;
register_oss_dsp(pcm, 0);
@@ -2963,7 +2963,7 @@ static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
pcm->oss.reg++;
pcm->oss.reg_mask |= 1;
}
- if (adsp_map[pcm->card->number] == (int)pcm->device) {
+ if (adsp_map[pcm->card->number] == pcm->device) {
register_oss_dsp(pcm, 1);
pcm->oss.reg++;
pcm->oss.reg_mask |= 2;
@@ -2988,7 +2988,7 @@ static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
pcm->card, 1);
}
- if (dsp_map[pcm->card->number] == (int)pcm->device) {
+ if (dsp_map[pcm->card->number] == pcm->device) {
#ifdef SNDRV_OSS_INFO_DEV_AUDIO
snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
#endif
@@ -3019,12 +3019,12 @@ static int __init alsa_pcm_oss_init(void)
/* check device map table */
for (i = 0; i < SNDRV_CARDS; i++) {
- if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
+ if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_OS_MINORS) {
snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
i, dsp_map[i]);
dsp_map[i] = 0;
}
- if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
+ if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_OS_MINORS) {
snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
i, adsp_map[i]);
adsp_map[i] = 1;
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index ece25c718e9..24271a3bd90 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -42,7 +42,7 @@ static int snd_pcm_dev_free(struct snd_device *device);
static int snd_pcm_dev_register(struct snd_device *device);
static int snd_pcm_dev_disconnect(struct snd_device *device);
-static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
+static inline struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
{
struct snd_pcm *pcm;
@@ -53,6 +53,37 @@ static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
return NULL;
}
+static inline int snd_pcm_next(struct snd_card *card, int device)
+{
+ struct snd_pcm *pcm;
+
+ list_for_each_entry(pcm, &snd_pcm_devices, list) {
+ if (pcm->card == card && pcm->device > device)
+ return pcm->device;
+ else if (pcm->card->number > card->number)
+ return -1;
+ }
+ return -1;
+}
+
+static inline int snd_pcm_add(struct snd_pcm *newpcm)
+{
+ struct snd_pcm *pcm;
+
+ list_for_each_entry(pcm, &snd_pcm_devices, list) {
+ if (pcm->card == newpcm->card && pcm->device == newpcm->device)
+ return -EBUSY;
+ if (pcm->card->number > newpcm->card->number ||
+ (pcm->card == newpcm->card &&
+ pcm->device > newpcm->device)) {
+ list_add(&newpcm->list, pcm->list.prev);
+ return 0;
+ }
+ }
+ list_add_tail(&newpcm->list, &snd_pcm_devices);
+ return 0;
+}
+
static int snd_pcm_control_ioctl(struct snd_card *card,
struct snd_ctl_file *control,
unsigned int cmd, unsigned long arg)
@@ -65,14 +96,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
if (get_user(device, (int __user *)arg))
return -EFAULT;
mutex_lock(&register_mutex);
- device = device < 0 ? 0 : device + 1;
- while (device < SNDRV_PCM_DEVICES) {
- if (snd_pcm_search(card, device))
- break;
- device++;
- }
- if (device == SNDRV_PCM_DEVICES)
- device = -1;
+ device = snd_pcm_next(card, device);
mutex_unlock(&register_mutex);
if (put_user(device, (int __user *)arg))
return -EFAULT;
@@ -98,7 +122,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
if (get_user(subdevice, &info->subdevice))
return -EFAULT;
mutex_lock(&register_mutex);
- pcm = snd_pcm_search(card, device);
+ pcm = snd_pcm_get(card, device);
if (pcm == NULL) {
err = -ENXIO;
goto _error;
@@ -931,11 +955,11 @@ static int snd_pcm_dev_register(struct snd_device *device)
snd_assert(pcm != NULL && device != NULL, return -ENXIO);
mutex_lock(&register_mutex);
- if (snd_pcm_search(pcm->card, pcm->device)) {
+ err = snd_pcm_add(pcm);
+ if (err) {
mutex_unlock(&register_mutex);
- return -EBUSY;
+ return err;
}
- list_add_tail(&pcm->list, &snd_pcm_devices);
for (cidx = 0; cidx < 2; cidx++) {
int devtype = -1;
if (pcm->streams[cidx].substream == NULL)
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 1003ae375d4..838dd9ee957 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -34,8 +34,6 @@
#include <linux/kmod.h>
#include <linux/mutex.h>
-#define SNDRV_OS_MINORS 256
-
static int major = CONFIG_SND_MAJOR;
int snd_major;
EXPORT_SYMBOL(snd_major);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-21 23:19:57 +0000