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Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/compress_offload.c18
-rw-r--r--sound/core/control.c171
-rw-r--r--sound/core/oss/pcm_oss.c6
-rw-r--r--sound/core/oss/pcm_plugin.c6
-rw-r--r--sound/core/pcm.c2
-rw-r--r--sound/core/pcm_native.c14
6 files changed, 112 insertions, 105 deletions
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index 26b5e245b074..a5b09e75e787 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -171,7 +171,8 @@ static int snd_compr_free(struct inode *inode, struct file *f)
}
data->stream.ops->free(&data->stream);
- kfree(data->stream.runtime->buffer);
+ if (!data->stream.runtime->dma_buffer_p)
+ kfree(data->stream.runtime->buffer);
kfree(data->stream.runtime);
kfree(data);
return 0;
@@ -505,7 +506,7 @@ static int snd_compr_allocate_buffer(struct snd_compr_stream *stream,
struct snd_compr_params *params)
{
unsigned int buffer_size;
- void *buffer;
+ void *buffer = NULL;
buffer_size = params->buffer.fragment_size * params->buffer.fragments;
if (stream->ops->copy) {
@@ -514,7 +515,18 @@ static int snd_compr_allocate_buffer(struct snd_compr_stream *stream,
* the data from core
*/
} else {
- buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (stream->runtime->dma_buffer_p) {
+
+ if (buffer_size > stream->runtime->dma_buffer_p->bytes)
+ dev_err(&stream->device->dev,
+ "Not enough DMA buffer");
+ else
+ buffer = stream->runtime->dma_buffer_p->area;
+
+ } else {
+ buffer = kmalloc(buffer_size, GFP_KERNEL);
+ }
+
if (!buffer)
return -ENOMEM;
}
diff --git a/sound/core/control.c b/sound/core/control.c
index 9aa15bfc7936..fad7db402443 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -348,67 +348,100 @@ static int snd_ctl_find_hole(struct snd_card *card, unsigned int count)
return 0;
}
-/**
- * snd_ctl_add - add the control instance to the card
- * @card: the card instance
- * @kcontrol: the control instance to add
- *
- * Adds the control instance created via snd_ctl_new() or
- * snd_ctl_new1() to the given card. Assigns also an unique
- * numid used for fast search.
- *
- * It frees automatically the control which cannot be added.
- *
- * Return: Zero if successful, or a negative error code on failure.
- *
- */
-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;
- int err = -EINVAL;
+ struct snd_kcontrol *old;
+ int err;
- if (! kcontrol)
- return err;
- if (snd_BUG_ON(!card || !kcontrol->info))
- goto error;
id = kcontrol->id;
if (id.index > UINT_MAX - kcontrol->count)
- goto error;
+ return -EINVAL;
- down_write(&card->controls_rwsem);
- if (snd_ctl_find_id(card, &id)) {
- up_write(&card->controls_rwsem);
- dev_err(card->dev, "control %i:%i:%i:%s:%i is already present\n",
- id.iface,
- id.device,
- id.subdevice,
- id.name,
- id.index);
- err = -EBUSY;
- goto error;
- }
- if (snd_ctl_find_hole(card, kcontrol->count) < 0) {
- up_write(&card->controls_rwsem);
- err = -ENOMEM;
- goto error;
+ 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)
+ return -ENOMEM;
+
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;
+}
+
+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
+ * @kcontrol: the control instance to add
+ *
+ * Adds the control instance created via snd_ctl_new() or
+ * snd_ctl_new1() to the given card. Assigns also an unique
+ * numid used for fast search.
+ *
+ * It frees automatically the control which cannot be added.
+ *
+ * Return: Zero if successful, or a negative error code on failure.
+ *
+ */
+int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
+{
+ return snd_ctl_add_replace(card, kcontrol, CTL_ADD_EXCLUSIVE);
+}
EXPORT_SYMBOL(snd_ctl_add);
/**
@@ -428,53 +461,8 @@ EXPORT_SYMBOL(snd_ctl_add);
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);
@@ -1361,9 +1349,12 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
kctl->tlv.c = snd_ctl_elem_user_tlv;
/* This function manage to free the instance on failure. */
- err = snd_ctl_add(card, kctl);
- if (err < 0)
- return err;
+ down_write(&card->controls_rwsem);
+ err = __snd_ctl_add_replace(card, kctl, CTL_ADD_EXCLUSIVE);
+ if (err < 0) {
+ snd_ctl_free_one(kctl);
+ goto unlock;
+ }
offset = snd_ctl_get_ioff(kctl, &info->id);
snd_ctl_build_ioff(&info->id, kctl, offset);
/*
@@ -1374,10 +1365,10 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
* which locks the element.
*/
- down_write(&card->controls_rwsem);
card->user_ctl_count++;
- up_write(&card->controls_rwsem);
+ unlock:
+ up_write(&card->controls_rwsem);
return 0;
}
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index f8d4a419f3af..467039b342b5 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1062,8 +1062,8 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
runtime->oss.channels = params_channels(params);
runtime->oss.rate = params_rate(params);
- vfree(runtime->oss.buffer);
- runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
+ kvfree(runtime->oss.buffer);
+ runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
if (!runtime->oss.buffer) {
err = -ENOMEM;
goto failure;
@@ -2328,7 +2328,7 @@ static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime;
runtime = substream->runtime;
- vfree(runtime->oss.buffer);
+ kvfree(runtime->oss.buffer);
runtime->oss.buffer = NULL;
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
snd_pcm_oss_plugin_clear(substream);
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index 141c5f3a9575..31cb2acf8afc 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -66,8 +66,8 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
return -ENXIO;
size /= 8;
if (plugin->buf_frames < frames) {
- vfree(plugin->buf);
- plugin->buf = vmalloc(size);
+ kvfree(plugin->buf);
+ plugin->buf = kvzalloc(size, GFP_KERNEL);
plugin->buf_frames = frames;
}
if (!plugin->buf) {
@@ -191,7 +191,7 @@ int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin)
if (plugin->private_free)
plugin->private_free(plugin);
kfree(plugin->buf_channels);
- vfree(plugin->buf);
+ kvfree(plugin->buf);
kfree(plugin);
return 0;
}
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index fdb9b92fc8d6..01b9d62eef14 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -25,6 +25,7 @@
#include <linux/time.h>
#include <linux/mutex.h>
#include <linux/device.h>
+#include <linux/nospec.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/pcm.h>
@@ -129,6 +130,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
return -EFAULT;
if (stream < 0 || stream > 1)
return -EINVAL;
+ stream = array_index_nospec(stream, 2);
if (get_user(subdevice, &info->subdevice))
return -EFAULT;
mutex_lock(&register_mutex);
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 66c90f486af9..818dff1de545 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -36,6 +36,7 @@
#include <sound/timer.h>
#include <sound/minors.h>
#include <linux/uio.h>
+#include <linux/delay.h>
#include "pcm_local.h"
@@ -91,12 +92,12 @@ static DECLARE_RWSEM(snd_pcm_link_rwsem);
* and this may lead to a deadlock when the code path takes read sem
* twice (e.g. one in snd_pcm_action_nonatomic() and another in
* snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to
- * spin until it gets the lock.
+ * sleep until all the readers are completed without blocking by writer.
*/
-static inline void down_write_nonblock(struct rw_semaphore *lock)
+static inline void down_write_nonfifo(struct rw_semaphore *lock)
{
while (!down_write_trylock(lock))
- cond_resched();
+ msleep(1);
}
#define PCM_LOCK_DEFAULT 0
@@ -1967,7 +1968,7 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
res = -ENOMEM;
goto _nolock;
}
- down_write_nonblock(&snd_pcm_link_rwsem);
+ down_write_nonfifo(&snd_pcm_link_rwsem);
write_lock_irq(&snd_pcm_link_rwlock);
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
substream->runtime->status->state != substream1->runtime->status->state ||
@@ -2014,7 +2015,7 @@ static int snd_pcm_unlink(struct snd_pcm_substream *substream)
struct snd_pcm_substream *s;
int res = 0;
- down_write_nonblock(&snd_pcm_link_rwsem);
+ down_write_nonfifo(&snd_pcm_link_rwsem);
write_lock_irq(&snd_pcm_link_rwlock);
if (!snd_pcm_stream_linked(substream)) {
res = -EALREADY;
@@ -2369,7 +2370,8 @@ int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
static void pcm_release_private(struct snd_pcm_substream *substream)
{
- snd_pcm_unlink(substream);
+ if (snd_pcm_stream_linked(substream))
+ snd_pcm_unlink(substream);
}
void snd_pcm_release_substream(struct snd_pcm_substream *substream)
generated by cgit (git 2.34.1) at 2025-06-01 05:04:35 +0000