From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/sound/core/control.c | 517 +++++++++++++++++++++++++++++++++++++--------------------
1 files changed, 335 insertions(+), 182 deletions(-)
diff --git a/kernel/sound/core/control.c b/kernel/sound/core/control.c
index 9cec0e8..3b44378 100644
--- a/kernel/sound/core/control.c
+++ b/kernel/sound/core/control.c
@@ -1,22 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Routines for driver control interface
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
- *
- *
- * 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
- *
*/
#include <linux/threads.h>
@@ -26,6 +11,7 @@
#include <linux/vmalloc.h>
#include <linux/time.h>
#include <linux/mm.h>
+#include <linux/math64.h>
#include <linux/sched/signal.h>
#include <sound/core.h>
#include <sound/minors.h>
@@ -54,7 +40,7 @@
struct snd_ctl_file *ctl;
int i, err;
- err = nonseekable_open(inode, file);
+ err = stream_open(inode, file);
if (err < 0)
return err;
@@ -164,14 +150,14 @@
return;
if (card->shutdown)
return;
- read_lock(&card->ctl_files_rwlock);
+ read_lock_irqsave(&card->ctl_files_rwlock, flags);
#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
card->mixer_oss_change_count++;
#endif
list_for_each_entry(ctl, &card->ctl_files, list) {
if (!ctl->subscribed)
continue;
- spin_lock_irqsave(&ctl->read_lock, flags);
+ spin_lock(&ctl->read_lock);
list_for_each_entry(ev, &ctl->events, list) {
if (ev->id.numid == id->numid) {
ev->mask |= mask;
@@ -188,10 +174,10 @@
}
_found:
wake_up(&ctl->change_sleep);
- spin_unlock_irqrestore(&ctl->read_lock, flags);
+ spin_unlock(&ctl->read_lock);
kill_fasync(&ctl->fasync, SIGIO, POLL_IN);
}
- read_unlock(&card->ctl_files_rwlock);
+ read_unlock_irqrestore(&card->ctl_files_rwlock, flags);
}
EXPORT_SYMBOL(snd_ctl_notify);
@@ -211,16 +197,12 @@
static int snd_ctl_new(struct snd_kcontrol **kctl, unsigned int count,
unsigned int access, struct snd_ctl_file *file)
{
- unsigned int size;
unsigned int idx;
if (count == 0 || count > MAX_CONTROL_COUNT)
return -EINVAL;
- size = sizeof(struct snd_kcontrol);
- size += sizeof(struct snd_kcontrol_volatile) * count;
-
- *kctl = kzalloc(size, GFP_KERNEL);
+ *kctl = kzalloc(struct_size(*kctl, vd, count), GFP_KERNEL);
if (!*kctl)
return -ENOMEM;
@@ -267,7 +249,8 @@
SNDRV_CTL_ELEM_ACCESS_INACTIVE |
SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND |
- SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
+ SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK |
+ SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK);
err = snd_ctl_new(&kctl, count, access, NULL);
if (err < 0)
@@ -348,22 +331,41 @@
return 0;
}
-/* add a new kcontrol object; call with card->controls_rwsem locked */
-static int __snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
+enum snd_ctl_add_mode {
+ CTL_ADD_EXCLUSIVE, CTL_REPLACE, CTL_ADD_ON_REPLACE,
+};
+
+/* add/replace a new kcontrol object; call with card->controls_rwsem locked */
+static int __snd_ctl_add_replace(struct snd_card *card,
+ struct snd_kcontrol *kcontrol,
+ enum snd_ctl_add_mode mode)
{
struct snd_ctl_elem_id id;
unsigned int idx;
unsigned int count;
+ struct snd_kcontrol *old;
+ int err;
id = kcontrol->id;
if (id.index > UINT_MAX - kcontrol->count)
return -EINVAL;
- if (snd_ctl_find_id(card, &id)) {
- dev_err(card->dev,
- "control %i:%i:%i:%s:%i is already present\n",
- id.iface, id.device, id.subdevice, id.name, id.index);
- return -EBUSY;
+ old = snd_ctl_find_id(card, &id);
+ if (!old) {
+ if (mode == CTL_REPLACE)
+ return -EINVAL;
+ } else {
+ if (mode == CTL_ADD_EXCLUSIVE) {
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i is already present\n",
+ id.iface, id.device, id.subdevice, id.name,
+ id.index);
+ return -EBUSY;
+ }
+
+ err = snd_ctl_remove(card, old);
+ if (err < 0)
+ return err;
}
if (snd_ctl_find_hole(card, kcontrol->count) < 0)
@@ -382,6 +384,29 @@
return 0;
}
+static int snd_ctl_add_replace(struct snd_card *card,
+ struct snd_kcontrol *kcontrol,
+ enum snd_ctl_add_mode mode)
+{
+ int err = -EINVAL;
+
+ if (! kcontrol)
+ return err;
+ if (snd_BUG_ON(!card || !kcontrol->info))
+ goto error;
+
+ down_write(&card->controls_rwsem);
+ err = __snd_ctl_add_replace(card, kcontrol, mode);
+ up_write(&card->controls_rwsem);
+ if (err < 0)
+ goto error;
+ return 0;
+
+ error:
+ snd_ctl_free_one(kcontrol);
+ return err;
+}
+
/**
* snd_ctl_add - add the control instance to the card
* @card: the card instance
@@ -398,23 +423,7 @@
*/
int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
{
- int err = -EINVAL;
-
- if (! kcontrol)
- return err;
- if (snd_BUG_ON(!card || !kcontrol->info))
- goto error;
-
- down_write(&card->controls_rwsem);
- err = __snd_ctl_add(card, kcontrol);
- up_write(&card->controls_rwsem);
- if (err < 0)
- goto error;
- return 0;
-
- error:
- snd_ctl_free_one(kcontrol);
- return err;
+ return snd_ctl_add_replace(card, kcontrol, CTL_ADD_EXCLUSIVE);
}
EXPORT_SYMBOL(snd_ctl_add);
@@ -435,53 +444,8 @@
int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol,
bool add_on_replace)
{
- struct snd_ctl_elem_id id;
- unsigned int count;
- unsigned int idx;
- struct snd_kcontrol *old;
- int ret;
-
- if (!kcontrol)
- return -EINVAL;
- if (snd_BUG_ON(!card || !kcontrol->info)) {
- ret = -EINVAL;
- goto error;
- }
- id = kcontrol->id;
- down_write(&card->controls_rwsem);
- old = snd_ctl_find_id(card, &id);
- if (!old) {
- if (add_on_replace)
- goto add;
- up_write(&card->controls_rwsem);
- ret = -EINVAL;
- goto error;
- }
- ret = snd_ctl_remove(card, old);
- if (ret < 0) {
- up_write(&card->controls_rwsem);
- goto error;
- }
-add:
- if (snd_ctl_find_hole(card, kcontrol->count) < 0) {
- up_write(&card->controls_rwsem);
- ret = -ENOMEM;
- goto error;
- }
- list_add_tail(&kcontrol->list, &card->controls);
- card->controls_count += kcontrol->count;
- kcontrol->id.numid = card->last_numid + 1;
- card->last_numid += kcontrol->count;
- id = kcontrol->id;
- count = kcontrol->count;
- up_write(&card->controls_rwsem);
- for (idx = 0; idx < count; idx++, id.index++, id.numid++)
- snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);
- return 0;
-
-error:
- snd_ctl_free_one(kcontrol);
- return ret;
+ return snd_ctl_add_replace(card, kcontrol,
+ add_on_replace ? CTL_ADD_ON_REPLACE : CTL_REPLACE);
}
EXPORT_SYMBOL(snd_ctl_replace);
@@ -753,22 +717,19 @@
}
static int snd_ctl_elem_list(struct snd_card *card,
- struct snd_ctl_elem_list __user *_list)
+ struct snd_ctl_elem_list *list)
{
- struct snd_ctl_elem_list list;
struct snd_kcontrol *kctl;
struct snd_ctl_elem_id id;
unsigned int offset, space, jidx;
int err = 0;
- if (copy_from_user(&list, _list, sizeof(list)))
- return -EFAULT;
- offset = list.offset;
- space = list.space;
+ offset = list->offset;
+ space = list->space;
down_read(&card->controls_rwsem);
- list.count = card->controls_count;
- list.used = 0;
+ list->count = card->controls_count;
+ list->used = 0;
if (space > 0) {
list_for_each_entry(kctl, &card->controls, list) {
if (offset >= kctl->count) {
@@ -777,12 +738,12 @@
}
for (jidx = offset; jidx < kctl->count; jidx++) {
snd_ctl_build_ioff(&id, kctl, jidx);
- if (copy_to_user(list.pids + list.used, &id,
+ if (copy_to_user(list->pids + list->used, &id,
sizeof(id))) {
err = -EFAULT;
goto out;
}
- list.used++;
+ list->used++;
if (!--space)
goto out;
}
@@ -791,56 +752,219 @@
}
out:
up_read(&card->controls_rwsem);
- if (!err && copy_to_user(_list, &list, sizeof(list)))
- err = -EFAULT;
return err;
}
-static bool validate_element_member_dimension(struct snd_ctl_elem_info *info)
+static int snd_ctl_elem_list_user(struct snd_card *card,
+ struct snd_ctl_elem_list __user *_list)
{
- unsigned int members;
- unsigned int i;
+ struct snd_ctl_elem_list list;
+ int err;
- if (info->dimen.d[0] == 0)
- return true;
+ if (copy_from_user(&list, _list, sizeof(list)))
+ return -EFAULT;
+ err = snd_ctl_elem_list(card, &list);
+ if (err)
+ return err;
+ if (copy_to_user(_list, &list, sizeof(list)))
+ return -EFAULT;
- members = 1;
- for (i = 0; i < ARRAY_SIZE(info->dimen.d); ++i) {
- if (info->dimen.d[i] == 0)
- break;
- members *= info->dimen.d[i];
-
- /*
- * info->count should be validated in advance, to guarantee
- * calculation soundness.
- */
- if (members > info->count)
- return false;
- }
-
- for (++i; i < ARRAY_SIZE(info->dimen.d); ++i) {
- if (info->dimen.d[i] > 0)
- return false;
- }
-
- return members == info->count;
+ return 0;
}
-static int snd_ctl_elem_info(struct snd_ctl_file *ctl,
- struct snd_ctl_elem_info *info)
+/* Check whether the given kctl info is valid */
+static int snd_ctl_check_elem_info(struct snd_card *card,
+ const struct snd_ctl_elem_info *info)
{
- struct snd_card *card = ctl->card;
- struct snd_kcontrol *kctl;
+ static const unsigned int max_value_counts[] = {
+ [SNDRV_CTL_ELEM_TYPE_BOOLEAN] = 128,
+ [SNDRV_CTL_ELEM_TYPE_INTEGER] = 128,
+ [SNDRV_CTL_ELEM_TYPE_ENUMERATED] = 128,
+ [SNDRV_CTL_ELEM_TYPE_BYTES] = 512,
+ [SNDRV_CTL_ELEM_TYPE_IEC958] = 1,
+ [SNDRV_CTL_ELEM_TYPE_INTEGER64] = 64,
+ };
+
+ if (info->type < SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
+ info->type > SNDRV_CTL_ELEM_TYPE_INTEGER64) {
+ if (card)
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i: invalid type %d\n",
+ info->id.iface, info->id.device,
+ info->id.subdevice, info->id.name,
+ info->id.index, info->type);
+ return -EINVAL;
+ }
+ if (info->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED &&
+ info->value.enumerated.items == 0) {
+ if (card)
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i: zero enum items\n",
+ info->id.iface, info->id.device,
+ info->id.subdevice, info->id.name,
+ info->id.index);
+ return -EINVAL;
+ }
+ if (info->count > max_value_counts[info->type]) {
+ if (card)
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i: invalid count %d\n",
+ info->id.iface, info->id.device,
+ info->id.subdevice, info->id.name,
+ info->id.index, info->count);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* The capacity of struct snd_ctl_elem_value.value.*/
+static const unsigned int value_sizes[] = {
+ [SNDRV_CTL_ELEM_TYPE_BOOLEAN] = sizeof(long),
+ [SNDRV_CTL_ELEM_TYPE_INTEGER] = sizeof(long),
+ [SNDRV_CTL_ELEM_TYPE_ENUMERATED] = sizeof(unsigned int),
+ [SNDRV_CTL_ELEM_TYPE_BYTES] = sizeof(unsigned char),
+ [SNDRV_CTL_ELEM_TYPE_IEC958] = sizeof(struct snd_aes_iec958),
+ [SNDRV_CTL_ELEM_TYPE_INTEGER64] = sizeof(long long),
+};
+
+#ifdef CONFIG_SND_CTL_VALIDATION
+/* fill the remaining snd_ctl_elem_value data with the given pattern */
+static void fill_remaining_elem_value(struct snd_ctl_elem_value *control,
+ struct snd_ctl_elem_info *info,
+ u32 pattern)
+{
+ size_t offset = value_sizes[info->type] * info->count;
+
+ offset = (offset + sizeof(u32) - 1) / sizeof(u32);
+ memset32((u32 *)control->value.bytes.data + offset, pattern,
+ sizeof(control->value) / sizeof(u32) - offset);
+}
+
+/* check whether the given integer ctl value is valid */
+static int sanity_check_int_value(struct snd_card *card,
+ const struct snd_ctl_elem_value *control,
+ const struct snd_ctl_elem_info *info,
+ int i)
+{
+ long long lval, lmin, lmax, lstep;
+ u64 rem;
+
+ switch (info->type) {
+ default:
+ case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
+ lval = control->value.integer.value[i];
+ lmin = 0;
+ lmax = 1;
+ lstep = 0;
+ break;
+ case SNDRV_CTL_ELEM_TYPE_INTEGER:
+ lval = control->value.integer.value[i];
+ lmin = info->value.integer.min;
+ lmax = info->value.integer.max;
+ lstep = info->value.integer.step;
+ break;
+ case SNDRV_CTL_ELEM_TYPE_INTEGER64:
+ lval = control->value.integer64.value[i];
+ lmin = info->value.integer64.min;
+ lmax = info->value.integer64.max;
+ lstep = info->value.integer64.step;
+ break;
+ case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
+ lval = control->value.enumerated.item[i];
+ lmin = 0;
+ lmax = info->value.enumerated.items - 1;
+ lstep = 0;
+ break;
+ }
+
+ if (lval < lmin || lval > lmax) {
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i: value out of range %lld (%lld/%lld) at count %i\n",
+ control->id.iface, control->id.device,
+ control->id.subdevice, control->id.name,
+ control->id.index, lval, lmin, lmax, i);
+ return -EINVAL;
+ }
+ if (lstep) {
+ div64_u64_rem(lval, lstep, &rem);
+ if (rem) {
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i: unaligned value %lld (step %lld) at count %i\n",
+ control->id.iface, control->id.device,
+ control->id.subdevice, control->id.name,
+ control->id.index, lval, lstep, i);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/* perform sanity checks to the given snd_ctl_elem_value object */
+static int sanity_check_elem_value(struct snd_card *card,
+ const struct snd_ctl_elem_value *control,
+ const struct snd_ctl_elem_info *info,
+ u32 pattern)
+{
+ size_t offset;
+ int i, ret = 0;
+ u32 *p;
+
+ switch (info->type) {
+ case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
+ case SNDRV_CTL_ELEM_TYPE_INTEGER:
+ case SNDRV_CTL_ELEM_TYPE_INTEGER64:
+ case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
+ for (i = 0; i < info->count; i++) {
+ ret = sanity_check_int_value(card, control, info, i);
+ if (ret < 0)
+ return ret;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* check whether the remaining area kept untouched */
+ offset = value_sizes[info->type] * info->count;
+ offset = (offset + sizeof(u32) - 1) / sizeof(u32);
+ p = (u32 *)control->value.bytes.data + offset;
+ for (; offset < sizeof(control->value) / sizeof(u32); offset++, p++) {
+ if (*p != pattern) {
+ ret = -EINVAL;
+ break;
+ }
+ *p = 0; /* clear the checked area */
+ }
+
+ return ret;
+}
+#else
+static inline void fill_remaining_elem_value(struct snd_ctl_elem_value *control,
+ struct snd_ctl_elem_info *info,
+ u32 pattern)
+{
+}
+
+static inline int sanity_check_elem_value(struct snd_card *card,
+ struct snd_ctl_elem_value *control,
+ struct snd_ctl_elem_info *info,
+ u32 pattern)
+{
+ return 0;
+}
+#endif
+
+static int __snd_ctl_elem_info(struct snd_card *card,
+ struct snd_kcontrol *kctl,
+ struct snd_ctl_elem_info *info,
+ struct snd_ctl_file *ctl)
+{
struct snd_kcontrol_volatile *vd;
unsigned int index_offset;
int result;
- down_read(&card->controls_rwsem);
- kctl = snd_ctl_find_id(card, &info->id);
- if (kctl == NULL) {
- up_read(&card->controls_rwsem);
- return -ENOENT;
- }
#ifdef CONFIG_SND_DEBUG
info->access = 0;
#endif
@@ -859,7 +983,26 @@
} else {
info->owner = -1;
}
+ if (!snd_ctl_skip_validation(info) &&
+ snd_ctl_check_elem_info(card, info) < 0)
+ result = -EINVAL;
}
+ return result;
+}
+
+static int snd_ctl_elem_info(struct snd_ctl_file *ctl,
+ struct snd_ctl_elem_info *info)
+{
+ struct snd_card *card = ctl->card;
+ struct snd_kcontrol *kctl;
+ int result;
+
+ down_read(&card->controls_rwsem);
+ kctl = snd_ctl_find_id(card, &info->id);
+ if (kctl == NULL)
+ result = -ENOENT;
+ else
+ result = __snd_ctl_elem_info(card, kctl, info, ctl);
up_read(&card->controls_rwsem);
return result;
}
@@ -878,6 +1021,8 @@
result = snd_ctl_elem_info(ctl, &info);
if (result < 0)
return result;
+ /* drop internal access flags */
+ info.access &= ~SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK;
if (copy_to_user(_info, &info, sizeof(info)))
return -EFAULT;
return result;
@@ -889,6 +1034,9 @@
struct snd_kcontrol *kctl;
struct snd_kcontrol_volatile *vd;
unsigned int index_offset;
+ struct snd_ctl_elem_info info;
+ const u32 pattern = 0xdeadbeef;
+ int ret;
kctl = snd_ctl_find_id(card, &control->id);
if (kctl == NULL)
@@ -900,7 +1048,31 @@
return -EPERM;
snd_ctl_build_ioff(&control->id, kctl, index_offset);
- return kctl->get(kctl, control);
+
+#ifdef CONFIG_SND_CTL_VALIDATION
+ /* info is needed only for validation */
+ memset(&info, 0, sizeof(info));
+ info.id = control->id;
+ ret = __snd_ctl_elem_info(card, kctl, &info, NULL);
+ if (ret < 0)
+ return ret;
+#endif
+
+ if (!snd_ctl_skip_validation(&info))
+ fill_remaining_elem_value(control, &info, pattern);
+ ret = kctl->get(kctl, control);
+ if (ret < 0)
+ return ret;
+ if (!snd_ctl_skip_validation(&info) &&
+ sanity_check_elem_value(card, control, &info, pattern) < 0) {
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i: access overflow\n",
+ control->id.iface, control->id.device,
+ control->id.subdevice, control->id.name,
+ control->id.index);
+ return -EINVAL;
+ }
+ return ret;
}
static int snd_ctl_elem_read_user(struct snd_card *card,
@@ -1241,23 +1413,6 @@
static int snd_ctl_elem_add(struct snd_ctl_file *file,
struct snd_ctl_elem_info *info, int replace)
{
- /* The capacity of struct snd_ctl_elem_value.value.*/
- static const unsigned int value_sizes[] = {
- [SNDRV_CTL_ELEM_TYPE_BOOLEAN] = sizeof(long),
- [SNDRV_CTL_ELEM_TYPE_INTEGER] = sizeof(long),
- [SNDRV_CTL_ELEM_TYPE_ENUMERATED] = sizeof(unsigned int),
- [SNDRV_CTL_ELEM_TYPE_BYTES] = sizeof(unsigned char),
- [SNDRV_CTL_ELEM_TYPE_IEC958] = sizeof(struct snd_aes_iec958),
- [SNDRV_CTL_ELEM_TYPE_INTEGER64] = sizeof(long long),
- };
- static const unsigned int max_value_counts[] = {
- [SNDRV_CTL_ELEM_TYPE_BOOLEAN] = 128,
- [SNDRV_CTL_ELEM_TYPE_INTEGER] = 128,
- [SNDRV_CTL_ELEM_TYPE_ENUMERATED] = 128,
- [SNDRV_CTL_ELEM_TYPE_BYTES] = 512,
- [SNDRV_CTL_ELEM_TYPE_IEC958] = 1,
- [SNDRV_CTL_ELEM_TYPE_INTEGER64] = 64,
- };
struct snd_card *card = file->card;
struct snd_kcontrol *kctl;
unsigned int count;
@@ -1309,16 +1464,12 @@
* Check information and calculate the size of data specific to
* this userspace control.
*/
- if (info->type < SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
- info->type > SNDRV_CTL_ELEM_TYPE_INTEGER64)
- return -EINVAL;
- if (info->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED &&
- info->value.enumerated.items == 0)
- return -EINVAL;
- if (info->count < 1 ||
- info->count > max_value_counts[info->type])
- return -EINVAL;
- if (!validate_element_member_dimension(info))
+ /* pass NULL to card for suppressing error messages */
+ err = snd_ctl_check_elem_info(NULL, info);
+ if (err < 0)
+ return err;
+ /* user-space control doesn't allow zero-size data */
+ if (info->count < 1)
return -EINVAL;
private_size = value_sizes[info->type] * info->count;
@@ -1369,7 +1520,7 @@
/* This function manage to free the instance on failure. */
down_write(&card->controls_rwsem);
- err = __snd_ctl_add(card, kctl);
+ err = __snd_ctl_add_replace(card, kctl, CTL_ADD_EXCLUSIVE);
if (err < 0) {
snd_ctl_free_one(kctl);
goto unlock;
@@ -1564,7 +1715,7 @@
case SNDRV_CTL_IOCTL_CARD_INFO:
return snd_ctl_card_info(card, ctl, cmd, argp);
case SNDRV_CTL_IOCTL_ELEM_LIST:
- return snd_ctl_elem_list(card, argp);
+ return snd_ctl_elem_list_user(card, argp);
case SNDRV_CTL_IOCTL_ELEM_INFO:
return snd_ctl_elem_info_user(ctl, argp);
case SNDRV_CTL_IOCTL_ELEM_READ:
@@ -1774,8 +1925,8 @@
#ifdef CONFIG_COMPAT
/**
- * snd_ctl_unregister_ioctl - de-register the device-specific compat 32bit
- * control-ioctls
+ * snd_ctl_unregister_ioctl_compat - de-register the device-specific compat
+ * 32bit control-ioctls
* @fcn: ioctl callback function to unregister
*/
int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn)
@@ -1800,8 +1951,9 @@
{
struct snd_ctl_file *kctl;
int subdevice = -1;
+ unsigned long flags;
- read_lock(&card->ctl_files_rwlock);
+ read_lock_irqsave(&card->ctl_files_rwlock, flags);
list_for_each_entry(kctl, &card->ctl_files, list) {
if (kctl->pid == task_pid(current)) {
subdevice = kctl->preferred_subdevice[type];
@@ -1809,7 +1961,7 @@
break;
}
}
- read_unlock(&card->ctl_files_rwlock);
+ read_unlock_irqrestore(&card->ctl_files_rwlock, flags);
return subdevice;
}
EXPORT_SYMBOL_GPL(snd_ctl_get_preferred_subdevice);
@@ -1858,13 +2010,14 @@
{
struct snd_card *card = device->device_data;
struct snd_ctl_file *ctl;
+ unsigned long flags;
- read_lock(&card->ctl_files_rwlock);
+ read_lock_irqsave(&card->ctl_files_rwlock, flags);
list_for_each_entry(ctl, &card->ctl_files, list) {
wake_up(&ctl->change_sleep);
kill_fasync(&ctl->fasync, SIGIO, POLL_ERR);
}
- read_unlock(&card->ctl_files_rwlock);
+ read_unlock_irqrestore(&card->ctl_files_rwlock, flags);
return snd_unregister_device(&card->ctl_dev);
}
@@ -1893,7 +2046,7 @@
*/
int snd_ctl_create(struct snd_card *card)
{
- static struct snd_device_ops ops = {
+ static const struct snd_device_ops ops = {
.dev_free = snd_ctl_dev_free,
.dev_register = snd_ctl_dev_register,
.dev_disconnect = snd_ctl_dev_disconnect,
--
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