[ALSA] dynamic minors (3/6): store device-specific object pointers dynamically
Instead of storing the pointers to the device-specific structures in an
array, put them into the struct snd_minor, and look them up dynamically.
This makes the device type modules independent of the minor number
encoding.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/include/sound/core.h b/include/sound/core.h
index 67b0a7e..90ac613 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -187,6 +187,7 @@
int card; /* card number */
int device; /* device number */
struct file_operations *f_ops; /* file operations */
+ void *private_data; /* private data for f_ops->open */
char name[0]; /* device name (keep at the end of
structure) */
};
@@ -199,13 +200,17 @@
void snd_request_card(int card);
int snd_register_device(int type, struct snd_card *card, int dev,
- struct file_operations *f_ops, const char *name);
+ struct file_operations *f_ops, void *private_data,
+ const char *name);
int snd_unregister_device(int type, struct snd_card *card, int dev);
+void *snd_lookup_minor_data(unsigned int minor, int type);
#ifdef CONFIG_SND_OSSEMUL
int snd_register_oss_device(int type, struct snd_card *card, int dev,
- struct file_operations *f_ops, const char *name);
+ struct file_operations *f_ops, void *private_data,
+ const char *name);
int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
+void *snd_lookup_oss_minor_data(unsigned int minor, int type);
#endif
int snd_minor_info_init(void);
diff --git a/include/sound/hwdep.h b/include/sound/hwdep.h
index 04b20bc..c679e5b 100644
--- a/include/sound/hwdep.h
+++ b/include/sound/hwdep.h
@@ -43,6 +43,7 @@
struct snd_hwdep {
struct snd_card *card;
+ struct list_head list;
int device;
char id[32];
char name[80];
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 5e29b0e..314268a 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -412,6 +412,7 @@
struct snd_pcm {
struct snd_card *card;
+ struct list_head list;
unsigned int device; /* device number */
unsigned int info_flags;
unsigned short dev_class;
@@ -439,7 +440,6 @@
* Registering
*/
-extern struct snd_pcm *snd_pcm_devices[];
extern struct file_operations snd_pcm_f_ops[2];
int snd_pcm_new(struct snd_card *card, char *id, int device,
diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
index 9492a32..d19bddf 100644
--- a/include/sound/rawmidi.h
+++ b/include/sound/rawmidi.h
@@ -113,7 +113,7 @@
struct snd_rawmidi {
struct snd_card *card;
-
+ struct list_head list;
unsigned int device; /* device number */
unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
char id[64];
@@ -165,8 +165,8 @@
/* main midi functions */
int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
-int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice, int mode,
- struct snd_rawmidi_file *rfile);
+int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
+ int mode, struct snd_rawmidi_file *rfile);
int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
struct snd_rawmidi_params *params);