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Diffstat (limited to 'sound/core/control_compat.c')
-rw-r--r--sound/core/control_compat.c71
1 files changed, 52 insertions, 19 deletions
diff --git a/sound/core/control_compat.c b/sound/core/control_compat.c
index 418c6d4e5da..b9c0910fb8c 100644
--- a/sound/core/control_compat.c
+++ b/sound/core/control_compat.c
@@ -21,6 +21,7 @@
/* this file included from control.c */
#include <linux/compat.h>
+#include <linux/slab.h>
struct snd_ctl_elem_list32 {
u32 offset;
@@ -82,6 +83,8 @@ struct snd_ctl_elem_info32 {
u32 items;
u32 item;
char name[64];
+ u64 names_ptr;
+ u32 names_length;
} enumerated;
unsigned char reserved[128];
} value;
@@ -107,7 +110,13 @@ static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
*/
if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
goto error;
- err = snd_ctl_elem_info(ctl, data);
+
+ snd_power_lock(ctl->card);
+ err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
+ if (err >= 0)
+ err = snd_ctl_elem_info(ctl, data);
+ snd_power_unlock(ctl->card);
+
if (err < 0)
goto error;
/* restore info to 32bit */
@@ -167,7 +176,7 @@ static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
int *countp)
{
struct snd_kcontrol *kctl;
- struct snd_ctl_elem_info info;
+ struct snd_ctl_elem_info *info;
int err;
down_read(&card->controls_rwsem);
@@ -176,13 +185,19 @@ static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
up_read(&card->controls_rwsem);
return -ENXIO;
}
- info.id = *id;
- err = kctl->info(kctl, &info);
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (info == NULL) {
+ up_read(&card->controls_rwsem);
+ return -ENOMEM;
+ }
+ info->id = *id;
+ err = kctl->info(kctl, info);
up_read(&card->controls_rwsem);
if (err >= 0) {
- err = info.type;
- *countp = info.count;
+ err = info->type;
+ *countp = info->count;
}
+ kfree(info);
return err;
}
@@ -207,7 +222,8 @@ static int copy_ctl_value_from_user(struct snd_card *card,
struct snd_ctl_elem_value32 __user *data32,
int *typep, int *countp)
{
- int i, type, count, size;
+ int i, type, size;
+ int uninitialized_var(count);
unsigned int indirect;
if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
@@ -231,7 +247,7 @@ static int copy_ctl_value_from_user(struct snd_card *card,
} else {
size = get_elem_size(type, count);
if (size < 0) {
- printk(KERN_ERR "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
+ dev_err(card->dev, "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
return -EINVAL;
}
if (copy_from_user(data->value.bytes.data,
@@ -280,9 +296,14 @@ static int snd_ctl_elem_read_user_compat(struct snd_card *card,
if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
goto error;
- if ((err = snd_ctl_elem_read(card, data)) < 0)
- goto error;
- err = copy_ctl_value_to_user(data32, data, type, count);
+
+ snd_power_lock(card);
+ err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
+ if (err >= 0)
+ err = snd_ctl_elem_read(card, data);
+ snd_power_unlock(card);
+ if (err >= 0)
+ err = copy_ctl_value_to_user(data32, data, type, count);
error:
kfree(data);
return err;
@@ -292,17 +313,23 @@ static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
struct snd_ctl_elem_value32 __user *data32)
{
struct snd_ctl_elem_value *data;
+ struct snd_card *card = file->card;
int err, type, count;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
- if ((err = copy_ctl_value_from_user(file->card, data, data32, &type, &count)) < 0)
- goto error;
- if ((err = snd_ctl_elem_write(file->card, file, data)) < 0)
+ if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
goto error;
- err = copy_ctl_value_to_user(data32, data, type, count);
+
+ snd_power_lock(card);
+ err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
+ if (err >= 0)
+ err = snd_ctl_elem_write(card, file, data);
+ snd_power_unlock(card);
+ if (err >= 0)
+ err = copy_ctl_value_to_user(data32, data, type, count);
error:
kfree(data);
return err;
@@ -347,6 +374,8 @@ static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
&data32->value.enumerated,
sizeof(data->value.enumerated)))
goto error;
+ data->value.enumerated.names_ptr =
+ (uintptr_t)compat_ptr(data->value.enumerated.names_ptr);
break;
default:
break;
@@ -369,12 +398,13 @@ enum {
static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
struct snd_ctl_file *ctl;
- struct list_head *list;
+ struct snd_kctl_ioctl *p;
void __user *argp = compat_ptr(arg);
int err;
ctl = file->private_data;
- snd_assert(ctl && ctl->card, return -ENXIO);
+ if (snd_BUG_ON(!ctl || !ctl->card))
+ return -ENXIO;
switch (cmd) {
case SNDRV_CTL_IOCTL_PVERSION:
@@ -384,6 +414,10 @@ static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, uns
case SNDRV_CTL_IOCTL_POWER_STATE:
case SNDRV_CTL_IOCTL_ELEM_LOCK:
case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
+ case SNDRV_CTL_IOCTL_ELEM_REMOVE:
+ case SNDRV_CTL_IOCTL_TLV_READ:
+ case SNDRV_CTL_IOCTL_TLV_WRITE:
+ case SNDRV_CTL_IOCTL_TLV_COMMAND:
return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
case SNDRV_CTL_IOCTL_ELEM_LIST32:
return snd_ctl_elem_list_compat(ctl->card, argp);
@@ -400,8 +434,7 @@ static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, uns
}
down_read(&snd_ioctl_rwsem);
- list_for_each(list, &snd_control_compat_ioctls) {
- struct snd_kctl_ioctl *p = list_entry(list, struct snd_kctl_ioctl, list);
+ list_for_each_entry(p, &snd_control_compat_ioctls, list) {
if (p->fioctl) {
err = p->fioctl(ctl->card, ctl, cmd, arg);
if (err != -ENOIOCTLCMD) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:31:51 +0000