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Diffstat (limited to 'sound/core/pcm_lib.c')
-rw-r--r--sound/core/pcm_lib.c150
1 files changed, 85 insertions, 65 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 1533f0379e9d..921691080f35 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -85,7 +85,8 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
}
frames = runtime->buffer_size - runtime->silence_filled;
}
- snd_assert(frames <= runtime->buffer_size, return);
+ if (snd_BUG_ON(frames > runtime->buffer_size))
+ return;
if (frames == 0)
return;
ofs = runtime->silence_start % runtime->buffer_size;
@@ -96,7 +97,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
if (substream->ops->silence) {
int err;
err = substream->ops->silence(substream, -1, ofs, transfer);
- snd_assert(err >= 0, );
+ snd_BUG_ON(err < 0);
} else {
char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs);
snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels);
@@ -108,7 +109,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
for (c = 0; c < channels; ++c) {
int err;
err = substream->ops->silence(substream, c, ofs, transfer);
- snd_assert(err >= 0, );
+ snd_BUG_ON(err < 0);
}
} else {
size_t dma_csize = runtime->dma_bytes / channels;
@@ -354,7 +355,7 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
{
u_int64_t n = (u_int64_t) a * b;
if (c == 0) {
- snd_assert(n > 0, );
+ snd_BUG_ON(!n);
*r = 0;
return UINT_MAX;
}
@@ -380,7 +381,8 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
{
int changed = 0;
- snd_assert(!snd_interval_empty(i), return -EINVAL);
+ if (snd_BUG_ON(snd_interval_empty(i)))
+ return -EINVAL;
if (i->min < v->min) {
i->min = v->min;
i->openmin = v->openmin;
@@ -423,7 +425,8 @@ EXPORT_SYMBOL(snd_interval_refine);
static int snd_interval_refine_first(struct snd_interval *i)
{
- snd_assert(!snd_interval_empty(i), return -EINVAL);
+ if (snd_BUG_ON(snd_interval_empty(i)))
+ return -EINVAL;
if (snd_interval_single(i))
return 0;
i->max = i->min;
@@ -435,7 +438,8 @@ static int snd_interval_refine_first(struct snd_interval *i)
static int snd_interval_refine_last(struct snd_interval *i)
{
- snd_assert(!snd_interval_empty(i), return -EINVAL);
+ if (snd_BUG_ON(snd_interval_empty(i)))
+ return -EINVAL;
if (snd_interval_single(i))
return 0;
i->min = i->max;
@@ -889,7 +893,8 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
c->private = private;
k = 0;
while (1) {
- snd_assert(k < ARRAY_SIZE(c->deps), return -EINVAL);
+ if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps)))
+ return -EINVAL;
c->deps[k++] = dep;
if (dep < 0)
break;
@@ -903,12 +908,12 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
EXPORT_SYMBOL(snd_pcm_hw_rule_add);
/**
- * snd_pcm_hw_constraint_mask
+ * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the mask
* @mask: the bitmap mask
*
- * Apply the constraint of the given bitmap mask to a mask parameter.
+ * Apply the constraint of the given bitmap mask to a 32-bit mask parameter.
*/
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
u_int32_t mask)
@@ -923,12 +928,12 @@ int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param
}
/**
- * snd_pcm_hw_constraint_mask64
+ * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the mask
* @mask: the 64bit bitmap mask
*
- * Apply the constraint of the given bitmap mask to a mask parameter.
+ * Apply the constraint of the given bitmap mask to a 64-bit mask parameter.
*/
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
u_int64_t mask)
@@ -944,7 +949,7 @@ int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_par
}
/**
- * snd_pcm_hw_constraint_integer
+ * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the integer constraint
*
@@ -959,7 +964,7 @@ int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_pa
EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
/**
- * snd_pcm_hw_constraint_minmax
+ * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the range
* @min: the minimal value
@@ -990,7 +995,7 @@ static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params,
/**
- * snd_pcm_hw_constraint_list
+ * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the list constraint
@@ -1026,7 +1031,7 @@ static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params,
}
/**
- * snd_pcm_hw_constraint_ratnums
+ * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the ratnums constraint
@@ -1059,7 +1064,7 @@ static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params,
}
/**
- * snd_pcm_hw_constraint_ratdens
+ * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the ratdens constraint
@@ -1090,7 +1095,7 @@ static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params,
}
/**
- * snd_pcm_hw_constraint_msbits
+ * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule
* @runtime: PCM runtime instance
* @cond: condition bits
* @width: sample bits width
@@ -1118,7 +1123,7 @@ static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params,
}
/**
- * snd_pcm_hw_constraint_step
+ * snd_pcm_hw_constraint_step - add a hw constraint step rule
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the step constraint
@@ -1149,7 +1154,7 @@ static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm
}
/**
- * snd_pcm_hw_constraint_pow2
+ * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the power-of-2 constraint
@@ -1197,13 +1202,13 @@ void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params)
EXPORT_SYMBOL(_snd_pcm_hw_params_any);
/**
- * snd_pcm_hw_param_value
+ * snd_pcm_hw_param_value - return @params field @var value
* @params: the hw_params instance
* @var: parameter to retrieve
- * @dir: pointer to the direction (-1,0,1) or NULL
+ * @dir: pointer to the direction (-1,0,1) or %NULL
*
- * Return the value for field PAR if it's fixed in configuration space
- * defined by PARAMS. Return -EINVAL otherwise
+ * Return the value for field @var if it's fixed in configuration space
+ * defined by @params. Return -%EINVAL otherwise.
*/
int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var, int *dir)
@@ -1266,13 +1271,13 @@ static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
/**
- * snd_pcm_hw_param_first
+ * snd_pcm_hw_param_first - refine config space and return minimum value
* @pcm: PCM instance
* @params: the hw_params instance
* @var: parameter to retrieve
- * @dir: pointer to the direction (-1,0,1) or NULL
+ * @dir: pointer to the direction (-1,0,1) or %NULL
*
- * Inside configuration space defined by PARAMS remove from PAR all
+ * Inside configuration space defined by @params remove from @var all
* values > minimum. Reduce configuration space accordingly.
* Return the minimum.
*/
@@ -1285,7 +1290,8 @@ int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
return changed;
if (params->rmask) {
int err = snd_pcm_hw_refine(pcm, params);
- snd_assert(err >= 0, return err);
+ if (snd_BUG_ON(err < 0))
+ return err;
}
return snd_pcm_hw_param_value(params, var, dir);
}
@@ -1311,13 +1317,13 @@ static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params,
/**
- * snd_pcm_hw_param_last
+ * snd_pcm_hw_param_last - refine config space and return maximum value
* @pcm: PCM instance
* @params: the hw_params instance
* @var: parameter to retrieve
- * @dir: pointer to the direction (-1,0,1) or NULL
+ * @dir: pointer to the direction (-1,0,1) or %NULL
*
- * Inside configuration space defined by PARAMS remove from PAR all
+ * Inside configuration space defined by @params remove from @var all
* values < maximum. Reduce configuration space accordingly.
* Return the maximum.
*/
@@ -1330,7 +1336,8 @@ int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
return changed;
if (params->rmask) {
int err = snd_pcm_hw_refine(pcm, params);
- snd_assert(err >= 0, return err);
+ if (snd_BUG_ON(err < 0))
+ return err;
}
return snd_pcm_hw_param_value(params, var, dir);
}
@@ -1338,11 +1345,11 @@ int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
EXPORT_SYMBOL(snd_pcm_hw_param_last);
/**
- * snd_pcm_hw_param_choose
+ * snd_pcm_hw_param_choose - choose a configuration defined by @params
* @pcm: PCM instance
* @params: the hw_params instance
*
- * Choose one configuration from configuration space defined by PARAMS
+ * Choose one configuration from configuration space defined by @params.
* The configuration chosen is that obtained fixing in this order:
* first access, first format, first subformat, min channels,
* min rate, min period time, max buffer size, min tick time
@@ -1368,7 +1375,8 @@ int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
err = snd_pcm_hw_param_first(pcm, params, *v, NULL);
else
err = snd_pcm_hw_param_last(pcm, params, *v, NULL);
- snd_assert(err >= 0, return err);
+ if (snd_BUG_ON(err < 0))
+ return err;
}
return 0;
}
@@ -1466,9 +1474,9 @@ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime;
unsigned long flags;
- snd_assert(substream != NULL, return);
+ if (PCM_RUNTIME_CHECK(substream))
+ return;
runtime = substream->runtime;
- snd_assert(runtime != NULL, return);
if (runtime->transfer_ack_begin)
runtime->transfer_ack_begin(substream);
@@ -1567,7 +1575,6 @@ static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
return err;
} else {
char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
- snd_assert(runtime->dma_area, return -EFAULT);
if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames)))
return -EFAULT;
}
@@ -1629,7 +1636,10 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)
frames = cont;
- snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
+ if (snd_BUG_ON(!frames)) {
+ snd_pcm_stream_unlock_irq(substream);
+ return -EINVAL;
+ }
appl_ptr = runtime->control->appl_ptr;
appl_ofs = appl_ptr % runtime->buffer_size;
snd_pcm_stream_unlock_irq(substream);
@@ -1669,18 +1679,30 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
}
-snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
+/* sanity-check for read/write methods */
+static int pcm_sanity_check(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime;
- int nonblock;
-
- snd_assert(substream != NULL, return -ENXIO);
+ if (PCM_RUNTIME_CHECK(substream))
+ return -ENXIO;
runtime = substream->runtime;
- snd_assert(runtime != NULL, return -ENXIO);
- snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
+ if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area))
+ return -EINVAL;
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
+ return 0;
+}
+
+snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
+{
+ struct snd_pcm_runtime *runtime;
+ int nonblock;
+ int err;
+ err = pcm_sanity_check(substream);
+ if (err < 0)
+ return err;
+ runtime = substream->runtime;
nonblock = !!(substream->f_flags & O_NONBLOCK);
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
@@ -1703,7 +1725,8 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
int channels = runtime->channels;
int c;
if (substream->ops->copy) {
- snd_assert(substream->ops->silence != NULL, return -EINVAL);
+ if (snd_BUG_ON(!substream->ops->silence))
+ return -EINVAL;
for (c = 0; c < channels; ++c, ++bufs) {
if (*bufs == NULL) {
if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0)
@@ -1717,7 +1740,6 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
} else {
/* default transfer behaviour */
size_t dma_csize = runtime->dma_bytes / channels;
- snd_assert(runtime->dma_area, return -EFAULT);
for (c = 0; c < channels; ++c, ++bufs) {
char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
if (*bufs == NULL) {
@@ -1738,14 +1760,12 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
{
struct snd_pcm_runtime *runtime;
int nonblock;
+ int err;
- snd_assert(substream != NULL, return -ENXIO);
+ err = pcm_sanity_check(substream);
+ if (err < 0)
+ return err;
runtime = substream->runtime;
- snd_assert(runtime != NULL, return -ENXIO);
- snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
- if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
- return -EBADFD;
-
nonblock = !!(substream->f_flags & O_NONBLOCK);
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
@@ -1769,7 +1789,6 @@ static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream,
return err;
} else {
char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
- snd_assert(runtime->dma_area, return -EFAULT);
if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames)))
return -EFAULT;
}
@@ -1841,7 +1860,10 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)
frames = cont;
- snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL);
+ if (snd_BUG_ON(!frames)) {
+ snd_pcm_stream_unlock_irq(substream);
+ return -EINVAL;
+ }
appl_ptr = runtime->control->appl_ptr;
appl_ofs = appl_ptr % runtime->buffer_size;
snd_pcm_stream_unlock_irq(substream);
@@ -1879,14 +1901,12 @@ snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __u
{
struct snd_pcm_runtime *runtime;
int nonblock;
+ int err;
- snd_assert(substream != NULL, return -ENXIO);
+ err = pcm_sanity_check(substream);
+ if (err < 0)
+ return err;
runtime = substream->runtime;
- snd_assert(runtime != NULL, return -ENXIO);
- snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
- if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
- return -EBADFD;
-
nonblock = !!(substream->f_flags & O_NONBLOCK);
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
return -EINVAL;
@@ -1916,7 +1936,6 @@ static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
}
} else {
snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels;
- snd_assert(runtime->dma_area, return -EFAULT);
for (c = 0; c < channels; ++c, ++bufs) {
char *hwbuf;
char __user *buf;
@@ -1938,11 +1957,12 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
{
struct snd_pcm_runtime *runtime;
int nonblock;
+ int err;
- snd_assert(substream != NULL, return -ENXIO);
+ err = pcm_sanity_check(substream);
+ if (err < 0)
+ return err;
runtime = substream->runtime;
- snd_assert(runtime != NULL, return -ENXIO);
- snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL);
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-24 20:29:32 +0000