The problem is that we never passed the "idx" parameter to
tm6000_audio_init() so it's uninitialized. In fact, the struct
tm6000_ops ->init() definition didn't have idx as a parameter.
When I added the parameter to tm6000_ops, I also added a parameter to
the ->fini() callback. fini() is just a stub right now and it doesn't
need idx, but it's better to be symetric.
As I was updating the calls to init() I noticed that there were some
needless NULL checks. "dev" doesn't need to be checked because it is
the list cursor and can never be null. op->init() doesn't need to be
checked because we assumed it was non-null in the other function and
in fact it always is non-null with the current code. I removed these
uneeded checks because it made writing this patch slightly simpler.
Signed-off-by: Dan Carpenter <erro...@gmail.com>
diff --git a/drivers/staging/tm6000/tm6000-alsa.c
b/drivers/staging/tm6000/tm6000-alsa.c
index ce081cd..94c9f15 100644
--- a/drivers/staging/tm6000/tm6000-alsa.c
+++ b/drivers/staging/tm6000/tm6000-alsa.c
@@ -337,7 +337,7 @@ static int __devinit snd_tm6000_pcm(struct snd_tm6000_card
*chip,
* Alsa Constructor - Component probe
*/
-int tm6000_audio_init(struct tm6000_core *dev, int idx)
+static int tm6000_audio_init(struct tm6000_core *dev, int idx)
{
struct snd_card *card;
struct snd_tm6000_card *chip;
@@ -411,12 +411,12 @@ error:
return rc;
}
-static int tm6000_audio_fini(struct tm6000_core *dev)
+static int tm6000_audio_fini(struct tm6000_core *dev, int idx)
{
return 0;
}
-struct tm6000_ops audio_ops = {
+static struct tm6000_ops audio_ops = {
.id = TM6000_AUDIO,
.name = "TM6000 Audio Extension",
.init = tm6000_audio_init,
diff --git a/drivers/staging/tm6000/tm6000-core.c
b/drivers/staging/tm6000/tm6000-core.c
index 27f3f55..c71452c 100644
--- a/drivers/staging/tm6000/tm6000-core.c
+++ b/drivers/staging/tm6000/tm6000-core.c
@@ -661,13 +661,14 @@ static DEFINE_MUTEX(tm6000_extension_devlist_lock);
int tm6000_register_extension(struct tm6000_ops *ops)
{
struct tm6000_core *dev = NULL;
+ int idx = 0;
mutex_lock(&tm6000_devlist_mutex);
mutex_lock(&tm6000_extension_devlist_lock);
list_add_tail(&ops->next, &tm6000_extension_devlist);
list_for_each_entry(dev, &tm6000_devlist, devlist) {
- if (dev)
- ops->init(dev);
+ ops->init(dev, idx);
+ idx++;
}
printk(KERN_INFO "tm6000: Initialized (%s) extension\n", ops->name);
mutex_unlock(&tm6000_extension_devlist_lock);
@@ -679,11 +680,12 @@ EXPORT_SYMBOL(tm6000_register_extension);
void tm6000_unregister_extension(struct tm6000_ops *ops)
{
struct tm6000_core *dev = NULL;
+ int idx = 0;
mutex_lock(&tm6000_devlist_mutex);
list_for_each_entry(dev, &tm6000_devlist, devlist) {
- if (dev)
- ops->fini(dev);
+ ops->fini(dev, idx);
+ idx++;
}
mutex_lock(&tm6000_extension_devlist_lock);
@@ -697,12 +699,13 @@ EXPORT_SYMBOL(tm6000_unregister_extension);
void tm6000_init_extension(struct tm6000_core *dev)
{
struct tm6000_ops *ops = NULL;
+ int idx = 0;
mutex_lock(&tm6000_extension_devlist_lock);
if (!list_empty(&tm6000_extension_devlist)) {
list_for_each_entry(ops, &tm6000_extension_devlist, next) {
- if (ops->init)
- ops->init(dev);
+ ops->init(dev, idx);
+ idx++;
}
}
mutex_unlock(&tm6000_extension_devlist_lock);
@@ -711,12 +714,13 @@ void tm6000_init_extension(struct tm6000_core *dev)
void tm6000_close_extension(struct tm6000_core *dev)
{
struct tm6000_ops *ops = NULL;
+ int idx = 0;
mutex_lock(&tm6000_extension_devlist_lock);
if (!list_empty(&tm6000_extension_devlist)) {
list_for_each_entry(ops, &tm6000_extension_devlist, next) {
- if (ops->fini)
- ops->fini(dev);
+ ops->fini(dev, idx);
+ idx++;
}
}
mutex_unlock(&tm6000_extension_devlist_lock);
diff --git a/drivers/staging/tm6000/tm6000.h b/drivers/staging/tm6000/tm6000.h
index 7bbaf26..971a39a 100644
--- a/drivers/staging/tm6000/tm6000.h
+++ b/drivers/staging/tm6000/tm6000.h
@@ -213,8 +213,8 @@ struct tm6000_ops {
struct list_head next;
char *name;
int id;
- int (*init)(struct tm6000_core *);
- int (*fini)(struct tm6000_core *);
+ int (*init)(struct tm6000_core *, int idx);
+ int (*fini)(struct tm6000_core *, int idx);
};
struct tm6000_fh {
--
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