[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / control_compat.c

/*
 * compat ioctls for control API
 *
 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

/* this file included from control.c */

#include <linux/compat.h>
#include <linux/slab.h>

struct snd_ctl_elem_list32 {
	u32 offset;
	u32 space;
	u32 used;
	u32 count;
	u32 pids;
	unsigned char reserved[50];
} /* don't set packed attribute here */;

static int snd_ctl_elem_list_compat(struct snd_card *card,
				    struct snd_ctl_elem_list32 __user *data32)
{
	struct snd_ctl_elem_list __user *data;
	compat_caddr_t ptr;
	int err;

	data = compat_alloc_user_space(sizeof(*data));

	/* offset, space, used, count */
	if (copy_in_user(data, data32, 4 * sizeof(u32)))
		return -EFAULT;
	/* pids */
	if (get_user(ptr, &data32->pids) ||
	    put_user(compat_ptr(ptr), &data->pids))
		return -EFAULT;
	err = snd_ctl_elem_list(card, data);
	if (err < 0)
		return err;
	/* copy the result */
	if (copy_in_user(data32, data, 4 * sizeof(u32)))
		return -EFAULT;
	return 0;
}

/*
 * control element info
 * it uses union, so the things are not easy..
 */

struct snd_ctl_elem_info32 {
	struct snd_ctl_elem_id id; // the size of struct is same
	s32 type;
	u32 access;
	u32 count;
	s32 owner;
	union {
		struct {
			s32 min;
			s32 max;
			s32 step;
		} integer;
		struct {
			u64 min;
			u64 max;
			u64 step;
		} integer64;
		struct {
			u32 items;
			u32 item;
			char name[64];
			u64 names_ptr;
			u32 names_length;
		} enumerated;
		unsigned char reserved[128];
	} value;
	unsigned char reserved[64];
} __attribute__((packed));

static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
				    struct snd_ctl_elem_info32 __user *data32)
{
	struct snd_ctl_elem_info *data;
	int err;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (! data)
		return -ENOMEM;

	err = -EFAULT;
	/* copy id */
	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
		goto error;
	/* we need to copy the item index.
	 * hope this doesn't break anything..
	 */
	if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
		goto error;

	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 */
	err = -EFAULT;
	/* id, type, access, count */
	if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
	    copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
		goto error;
	if (put_user(data->owner, &data32->owner))
		goto error;
	switch (data->type) {
	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	case SNDRV_CTL_ELEM_TYPE_INTEGER:
		if (put_user(data->value.integer.min, &data32->value.integer.min) ||
		    put_user(data->value.integer.max, &data32->value.integer.max) ||
		    put_user(data->value.integer.step, &data32->value.integer.step))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
		if (copy_to_user(&data32->value.integer64,
				 &data->value.integer64,
				 sizeof(data->value.integer64)))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
		if (copy_to_user(&data32->value.enumerated,
				 &data->value.enumerated,
				 sizeof(data->value.enumerated)))
			goto error;
		break;
	default:
		break;
	}
	err = 0;
 error:
	kfree(data);
	return err;
}

/* read / write */
struct snd_ctl_elem_value32 {
	struct snd_ctl_elem_id id;
	unsigned int indirect;	/* bit-field causes misalignment */
        union {
		s32 integer[128];
		unsigned char data[512];
#ifndef CONFIG_X86_64
		s64 integer64[64];
#endif
        } value;
        unsigned char reserved[128];
};


/* get the value type and count of the control */
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;
	int err;

	down_read(&card->controls_rwsem);
	kctl = snd_ctl_find_id(card, id);
	if (! kctl) {
		up_read(&card->controls_rwsem);
		return -ENXIO;
	}
	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;
	}
	kfree(info);
	return err;
}

static int get_elem_size(int type, int count)
{
	switch (type) {
	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
		return sizeof(s64) * count;
	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
		return sizeof(int) * count;
	case SNDRV_CTL_ELEM_TYPE_BYTES:
		return 512;
	case SNDRV_CTL_ELEM_TYPE_IEC958:
		return sizeof(struct snd_aes_iec958);
	default:
		return -1;
	}
}

static int copy_ctl_value_from_user(struct snd_card *card,
				    struct snd_ctl_elem_value *data,
				    struct snd_ctl_elem_value32 __user *data32,
				    int *typep, int *countp)
{
	int i, type, size;
	int uninitialized_var(count);
	unsigned int indirect;

	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
		return -EFAULT;
	if (get_user(indirect, &data32->indirect))
		return -EFAULT;
	if (indirect)
		return -EINVAL;
	type = get_ctl_type(card, &data->id, &count);
	if (type < 0)
		return type;

	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
		for (i = 0; i < count; i++) {
			int val;
			if (get_user(val, &data32->value.integer[i]))
				return -EFAULT;
			data->value.integer.value[i] = val;
		}
	} else {
		size = get_elem_size(type, count);
		if (size < 0) {
			printk(KERN_ERR "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
			return -EINVAL;
		}
		if (copy_from_user(data->value.bytes.data,
				   data32->value.data, size))
			return -EFAULT;
	}

	*typep = type;
	*countp = count;
	return 0;
}

/* restore the value to 32bit */
static int copy_ctl_value_to_user(struct snd_ctl_elem_value32 __user *data32,
				  struct snd_ctl_elem_value *data,
				  int type, int count)
{
	int i, size;

	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
		for (i = 0; i < count; i++) {
			int val;
			val = data->value.integer.value[i];
			if (put_user(val, &data32->value.integer[i]))
				return -EFAULT;
		}
	} else {
		size = get_elem_size(type, count);
		if (copy_to_user(data32->value.data,
				 data->value.bytes.data, size))
			return -EFAULT;
	}
	return 0;
}

static int snd_ctl_elem_read_user_compat(struct snd_card *card, 
					 struct snd_ctl_elem_value32 __user *data32)
{
	struct snd_ctl_elem_value *data;
	int err, type, count;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (data == NULL)
		return -ENOMEM;

	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
		goto error;

	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;
}

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(card, data, data32, &type, &count)) < 0)
		goto error;

	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;
}

/* add or replace a user control */
static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
				   struct snd_ctl_elem_info32 __user *data32,
				   int replace)
{
	struct snd_ctl_elem_info *data;
	int err;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (! data)
		return -ENOMEM;

	err = -EFAULT;
	/* id, type, access, count */ \
	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
	    copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
		goto error;
	if (get_user(data->owner, &data32->owner) ||
	    get_user(data->type, &data32->type))
		goto error;
	switch (data->type) {
	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	case SNDRV_CTL_ELEM_TYPE_INTEGER:
		if (get_user(data->value.integer.min, &data32->value.integer.min) ||
		    get_user(data->value.integer.max, &data32->value.integer.max) ||
		    get_user(data->value.integer.step, &data32->value.integer.step))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
		if (copy_from_user(&data->value.integer64,
				   &data32->value.integer64,
				   sizeof(data->value.integer64)))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
		if (copy_from_user(&data->value.enumerated,
				   &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;
	}
	err = snd_ctl_elem_add(file, data, replace);
 error:
	kfree(data);
	return err;
}  

enum {
	SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
	SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
	SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
	SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
	SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
	SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
};

static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct snd_ctl_file *ctl;
	struct snd_kctl_ioctl *p;
	void __user *argp = compat_ptr(arg);
	int err;

	ctl = file->private_data;
	if (snd_BUG_ON(!ctl || !ctl->card))
		return -ENXIO;

	switch (cmd) {
	case SNDRV_CTL_IOCTL_PVERSION:
	case SNDRV_CTL_IOCTL_CARD_INFO:
	case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
	case SNDRV_CTL_IOCTL_POWER:
	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);
	case SNDRV_CTL_IOCTL_ELEM_INFO32:
		return snd_ctl_elem_info_compat(ctl, argp);
	case SNDRV_CTL_IOCTL_ELEM_READ32:
		return snd_ctl_elem_read_user_compat(ctl->card, argp);
	case SNDRV_CTL_IOCTL_ELEM_WRITE32:
		return snd_ctl_elem_write_user_compat(ctl, argp);
	case SNDRV_CTL_IOCTL_ELEM_ADD32:
		return snd_ctl_elem_add_compat(ctl, argp, 0);
	case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
		return snd_ctl_elem_add_compat(ctl, argp, 1);
	}

	down_read(&snd_ioctl_rwsem);
	list_for_each_entry(p, &snd_control_compat_ioctls, list) {
		if (p->fioctl) {
			err = p->fioctl(ctl->card, ctl, cmd, arg);
			if (err != -ENOIOCTLCMD) {
				up_read(&snd_ioctl_rwsem);
				return err;
			}
		}
	}
	up_read(&snd_ioctl_rwsem);
	return -ENOIOCTLCMD;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* compat ioctls for control API
	3	*
	4	* Copyright (c) by Takashi Iwai <tiwai@suse.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	/* this file included from control.c */
	22
	23	#include <linux/compat.h>
5a0e3ad6	24	#include <linux/slab.h>
1da177e4	25
82e9bae6	26	struct snd_ctl_elem_list32 {
1da177e4 LT	27	u32 offset;
	28	u32 space;
	29	u32 used;
	30	u32 count;
	31	u32 pids;
	32	unsigned char reserved[50];
	33	} /* don't set packed attribute here */;
	34
82e9bae6 TI	35	static int snd_ctl_elem_list_compat(struct snd_card *card,
82e9bae6 TI	36	struct snd_ctl_elem_list32 __user *data32)
1da177e4	37	{
82e9bae6	38	struct snd_ctl_elem_list __user *data;
1da177e4 LT	39	compat_caddr_t ptr;
	40	int err;
	41
	42	data = compat_alloc_user_space(sizeof(*data));
	43
	44	/* offset, space, used, count */
	45	if (copy_in_user(data, data32, 4 * sizeof(u32)))
	46	return -EFAULT;
	47	/* pids */
	48	if (get_user(ptr, &data32->pids) \|\|
	49	put_user(compat_ptr(ptr), &data->pids))
	50	return -EFAULT;
	51	err = snd_ctl_elem_list(card, data);
	52	if (err < 0)
	53	return err;
	54	/* copy the result */
	55	if (copy_in_user(data32, data, 4 * sizeof(u32)))
	56	return -EFAULT;
	57	return 0;
	58	}
	59
	60	/*
	61	* control element info
	62	* it uses union, so the things are not easy..
	63	*/
	64
82e9bae6 TI	65	struct snd_ctl_elem_info32 {
82e9bae6 TI	66	struct snd_ctl_elem_id id; // the size of struct is same
1da177e4 LT	67	s32 type;
	68	u32 access;
	69	u32 count;
	70	s32 owner;
	71	union {
	72	struct {
	73	s32 min;
	74	s32 max;
	75	s32 step;
	76	} integer;
	77	struct {
	78	u64 min;
	79	u64 max;
	80	u64 step;
	81	} integer64;
	82	struct {
	83	u32 items;
	84	u32 item;
	85	char name[64];
8d448162 CL	86	u64 names_ptr;
8d448162 CL	87	u32 names_length;
1da177e4 LT	88	} enumerated;
	89	unsigned char reserved[128];
	90	} value;
	91	unsigned char reserved[64];
	92	} __attribute__((packed));
	93
82e9bae6 TI	94	static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
82e9bae6 TI	95	struct snd_ctl_elem_info32 __user *data32)
1da177e4	96	{
82e9bae6	97	struct snd_ctl_elem_info *data;
1da177e4 LT	98	int err;
1da177e4 LT	99
ca2c0966	100	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	101	if (! data)
	102	return -ENOMEM;
	103
	104	err = -EFAULT;
	105	/* copy id */
	106	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
	107	goto error;
	108	/* we need to copy the item index.
	109	* hope this doesn't break anything..
	110	*/
	111	if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
	112	goto error;
64649400 GP	113
64649400 GP	114	snd_power_lock(ctl->card);
cbac4b0c	115	err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
64649400 GP	116	if (err >= 0)
	117	err = snd_ctl_elem_info(ctl, data);
	118	snd_power_unlock(ctl->card);
	119
1da177e4 LT	120	if (err < 0)
	121	goto error;
	122	/* restore info to 32bit */
	123	err = -EFAULT;
	124	/* id, type, access, count */
	125	if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) \|\|
	126	copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
	127	goto error;
	128	if (put_user(data->owner, &data32->owner))
	129	goto error;
	130	switch (data->type) {
	131	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	132	case SNDRV_CTL_ELEM_TYPE_INTEGER:
	133	if (put_user(data->value.integer.min, &data32->value.integer.min) \|\|
	134	put_user(data->value.integer.max, &data32->value.integer.max) \|\|
	135	put_user(data->value.integer.step, &data32->value.integer.step))
	136	goto error;
	137	break;
	138	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
	139	if (copy_to_user(&data32->value.integer64,
	140	&data->value.integer64,
	141	sizeof(data->value.integer64)))
	142	goto error;
	143	break;
	144	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
	145	if (copy_to_user(&data32->value.enumerated,
	146	&data->value.enumerated,
	147	sizeof(data->value.enumerated)))
	148	goto error;
	149	break;
	150	default:
	151	break;
	152	}
	153	err = 0;
	154	error:
	155	kfree(data);
	156	return err;
	157	}
	158
	159	/* read / write */
82e9bae6 TI	160	struct snd_ctl_elem_value32 {
82e9bae6 TI	161	struct snd_ctl_elem_id id;
1da177e4 LT	162	unsigned int indirect; /* bit-field causes misalignment */
	163	union {
	164	s32 integer[128];
	165	unsigned char data[512];
	166	#ifndef CONFIG_X86_64
	167	s64 integer64[64];
	168	#endif
	169	} value;
	170	unsigned char reserved[128];
	171	};
	172
	173
	174	/* get the value type and count of the control */
82e9bae6 TI	175	static int get_ctl_type(struct snd_card card, struct snd_ctl_elem_id id,
82e9bae6 TI	176	int *countp)
1da177e4	177	{
82e9bae6	178	struct snd_kcontrol *kctl;
aa657ca9	179	struct snd_ctl_elem_info *info;
1da177e4 LT	180	int err;
	181
	182	down_read(&card->controls_rwsem);
	183	kctl = snd_ctl_find_id(card, id);
	184	if (! kctl) {
	185	up_read(&card->controls_rwsem);
	186	return -ENXIO;
	187	}
aa657ca9 JK	188	info = kzalloc(sizeof(*info), GFP_KERNEL);
	189	if (info == NULL) {
	190	up_read(&card->controls_rwsem);
	191	return -ENOMEM;
	192	}
	193	info->id = *id;
	194	err = kctl->info(kctl, info);
1da177e4 LT	195	up_read(&card->controls_rwsem);
1da177e4 LT	196	if (err >= 0) {
aa657ca9 JK	197	err = info->type;
aa657ca9 JK	198	*countp = info->count;
1da177e4	199	}
aa657ca9	200	kfree(info);
1da177e4 LT	201	return err;
	202	}
	203
	204	static int get_elem_size(int type, int count)
	205	{
	206	switch (type) {
	207	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
	208	return sizeof(s64) * count;
	209	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
	210	return sizeof(int) * count;
	211	case SNDRV_CTL_ELEM_TYPE_BYTES:
	212	return 512;
	213	case SNDRV_CTL_ELEM_TYPE_IEC958:
82e9bae6	214	return sizeof(struct snd_aes_iec958);
1da177e4 LT	215	default:
	216	return -1;
	217	}
	218	}
	219
82e9bae6 TI	220	static int copy_ctl_value_from_user(struct snd_card *card,
	221	struct snd_ctl_elem_value *data,
	222	struct snd_ctl_elem_value32 __user *data32,
1da177e4 LT	223	int typep, int countp)
1da177e4 LT	224	{
5050b092 AM	225	int i, type, size;
5050b092 AM	226	int uninitialized_var(count);
1da177e4 LT	227	unsigned int indirect;
	228
	229	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
	230	return -EFAULT;
	231	if (get_user(indirect, &data32->indirect))
	232	return -EFAULT;
	233	if (indirect)
	234	return -EINVAL;
	235	type = get_ctl_type(card, &data->id, &count);
	236	if (type < 0)
	237	return type;
	238
	239	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN \|\|
	240	type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
	241	for (i = 0; i < count; i++) {
	242	int val;
	243	if (get_user(val, &data32->value.integer[i]))
	244	return -EFAULT;
	245	data->value.integer.value[i] = val;
	246	}
	247	} else {
	248	size = get_elem_size(type, count);
	249	if (size < 0) {
	250	printk(KERN_ERR "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
	251	return -EINVAL;
	252	}
	253	if (copy_from_user(data->value.bytes.data,
	254	data32->value.data, size))
	255	return -EFAULT;
	256	}
	257
	258	*typep = type;
	259	*countp = count;
	260	return 0;
	261	}
	262
	263	/* restore the value to 32bit */
82e9bae6 TI	264	static int copy_ctl_value_to_user(struct snd_ctl_elem_value32 __user *data32,
82e9bae6 TI	265	struct snd_ctl_elem_value *data,
1da177e4 LT	266	int type, int count)
	267	{
	268	int i, size;
	269
	270	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN \|\|
	271	type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
	272	for (i = 0; i < count; i++) {
	273	int val;
	274	val = data->value.integer.value[i];
	275	if (put_user(val, &data32->value.integer[i]))
	276	return -EFAULT;
	277	}
	278	} else {
	279	size = get_elem_size(type, count);
	280	if (copy_to_user(data32->value.data,
	281	data->value.bytes.data, size))
	282	return -EFAULT;
	283	}
	284	return 0;
	285	}
	286
82e9bae6 TI	287	static int snd_ctl_elem_read_user_compat(struct snd_card *card,
82e9bae6 TI	288	struct snd_ctl_elem_value32 __user *data32)
1da177e4	289	{
82e9bae6	290	struct snd_ctl_elem_value *data;
1da177e4 LT	291	int err, type, count;
1da177e4 LT	292
ca2c0966	293	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	294	if (data == NULL)
	295	return -ENOMEM;
	296
	297	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
	298	goto error;
64649400 GP	299
64649400 GP	300	snd_power_lock(card);
cbac4b0c	301	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
64649400 GP	302	if (err >= 0)
	303	err = snd_ctl_elem_read(card, data);
	304	snd_power_unlock(card);
	305	if (err >= 0)
	306	err = copy_ctl_value_to_user(data32, data, type, count);
1da177e4 LT	307	error:
	308	kfree(data);
	309	return err;
	310	}
	311
82e9bae6 TI	312	static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
82e9bae6 TI	313	struct snd_ctl_elem_value32 __user *data32)
1da177e4	314	{
82e9bae6	315	struct snd_ctl_elem_value *data;
64649400	316	struct snd_card *card = file->card;
1da177e4 LT	317	int err, type, count;
1da177e4 LT	318
ca2c0966	319	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	320	if (data == NULL)
	321	return -ENOMEM;
	322
64649400	323	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
1da177e4	324	goto error;
64649400 GP	325
64649400 GP	326	snd_power_lock(card);
cbac4b0c	327	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
64649400 GP	328	if (err >= 0)
	329	err = snd_ctl_elem_write(card, file, data);
	330	snd_power_unlock(card);
	331	if (err >= 0)
	332	err = copy_ctl_value_to_user(data32, data, type, count);
1da177e4 LT	333	error:
	334	kfree(data);
	335	return err;
	336	}
	337
	338	/* add or replace a user control */
82e9bae6 TI	339	static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
82e9bae6 TI	340	struct snd_ctl_elem_info32 __user *data32,
1da177e4 LT	341	int replace)
1da177e4 LT	342	{
82e9bae6	343	struct snd_ctl_elem_info *data;
1da177e4 LT	344	int err;
1da177e4 LT	345
ca2c0966	346	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	347	if (! data)
	348	return -ENOMEM;
	349
	350	err = -EFAULT;
	351	/* id, type, access, count */ \
	352	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) \|\|
	353	copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
	354	goto error;
	355	if (get_user(data->owner, &data32->owner) \|\|
	356	get_user(data->type, &data32->type))
	357	goto error;
	358	switch (data->type) {
	359	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	360	case SNDRV_CTL_ELEM_TYPE_INTEGER:
	361	if (get_user(data->value.integer.min, &data32->value.integer.min) \|\|
	362	get_user(data->value.integer.max, &data32->value.integer.max) \|\|
	363	get_user(data->value.integer.step, &data32->value.integer.step))
	364	goto error;
	365	break;
	366	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
	367	if (copy_from_user(&data->value.integer64,
	368	&data32->value.integer64,
	369	sizeof(data->value.integer64)))
	370	goto error;
	371	break;
	372	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
	373	if (copy_from_user(&data->value.enumerated,
	374	&data32->value.enumerated,
	375	sizeof(data->value.enumerated)))
	376	goto error;
8d448162 CL	377	data->value.enumerated.names_ptr =
8d448162 CL	378	(uintptr_t)compat_ptr(data->value.enumerated.names_ptr);
1da177e4 LT	379	break;
	380	default:
	381	break;
	382	}
	383	err = snd_ctl_elem_add(file, data, replace);
	384	error:
	385	kfree(data);
	386	return err;
	387	}
	388
	389	enum {
82e9bae6 TI	390	SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
	391	SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
	392	SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
	393	SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
	394	SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
	395	SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
1da177e4 LT	396	};
	397
	398	static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	399	{
82e9bae6	400	struct snd_ctl_file *ctl;
9244b2c3	401	struct snd_kctl_ioctl *p;
1da177e4 LT	402	void __user *argp = compat_ptr(arg);
	403	int err;
	404
	405	ctl = file->private_data;
7eaa943c TI	406	if (snd_BUG_ON(!ctl \|\| !ctl->card))
7eaa943c TI	407	return -ENXIO;
1da177e4 LT	408
	409	switch (cmd) {
	410	case SNDRV_CTL_IOCTL_PVERSION:
	411	case SNDRV_CTL_IOCTL_CARD_INFO:
	412	case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
	413	case SNDRV_CTL_IOCTL_POWER:
	414	case SNDRV_CTL_IOCTL_POWER_STATE:
	415	case SNDRV_CTL_IOCTL_ELEM_LOCK:
	416	case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
2b1181ed TI	417	case SNDRV_CTL_IOCTL_ELEM_REMOVE:
	418	case SNDRV_CTL_IOCTL_TLV_READ:
	419	case SNDRV_CTL_IOCTL_TLV_WRITE:
	420	case SNDRV_CTL_IOCTL_TLV_COMMAND:
1da177e4 LT	421	return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
	422	case SNDRV_CTL_IOCTL_ELEM_LIST32:
	423	return snd_ctl_elem_list_compat(ctl->card, argp);
	424	case SNDRV_CTL_IOCTL_ELEM_INFO32:
	425	return snd_ctl_elem_info_compat(ctl, argp);
	426	case SNDRV_CTL_IOCTL_ELEM_READ32:
	427	return snd_ctl_elem_read_user_compat(ctl->card, argp);
	428	case SNDRV_CTL_IOCTL_ELEM_WRITE32:
	429	return snd_ctl_elem_write_user_compat(ctl, argp);
	430	case SNDRV_CTL_IOCTL_ELEM_ADD32:
	431	return snd_ctl_elem_add_compat(ctl, argp, 0);
	432	case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
	433	return snd_ctl_elem_add_compat(ctl, argp, 1);
	434	}
	435
	436	down_read(&snd_ioctl_rwsem);
9244b2c3	437	list_for_each_entry(p, &snd_control_compat_ioctls, list) {
1da177e4 LT	438	if (p->fioctl) {
	439	err = p->fioctl(ctl->card, ctl, cmd, arg);
	440	if (err != -ENOIOCTLCMD) {
	441	up_read(&snd_ioctl_rwsem);
	442	return err;
	443	}
	444	}
	445	}
	446	up_read(&snd_ioctl_rwsem);
	447	return -ENOIOCTLCMD;
	448	}