[PATCH 2/7] ALSA: pcm: Fix missing return value comments for kernel docs
Takashi Iwai
tiwai at suse.de
Wed Jul 13 12:47:54 CEST 2022
Each kernel doc comment expects the definition of the return value in
a proper format. This patch adds or fixes the missing entries for PCM
API.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
include/sound/pcm.h | 50 +++++++++++++++++++++++++++++++++++++++--
sound/core/pcm.c | 4 ++++
sound/core/pcm_memory.c | 4 ++++
sound/core/pcm_native.c | 6 +++++
4 files changed, 62 insertions(+), 2 deletions(-)
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 6b99310b5b88..08cf4a5801f3 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -607,7 +607,7 @@ snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
* snd_pcm_stream_linked - Check whether the substream is linked with others
* @substream: substream to check
*
- * Returns true if the given substream is being linked with others.
+ * Return: true if the given substream is being linked with others
*/
static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
{
@@ -673,7 +673,7 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
* snd_pcm_running - Check whether the substream is in a running state
* @substream: substream to check
*
- * Returns true if the given substream is in the state RUNNING, or in the
+ * Return: true if the given substream is in the state RUNNING, or in the
* state DRAINING for playback.
*/
static inline int snd_pcm_running(struct snd_pcm_substream *substream)
@@ -687,6 +687,8 @@ static inline int snd_pcm_running(struct snd_pcm_substream *substream)
* bytes_to_samples - Unit conversion of the size from bytes to samples
* @runtime: PCM runtime instance
* @size: size in bytes
+ *
+ * Return: the size in samples
*/
static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
{
@@ -697,6 +699,8 @@ static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t
* bytes_to_frames - Unit conversion of the size from bytes to frames
* @runtime: PCM runtime instance
* @size: size in bytes
+ *
+ * Return: the size in frames
*/
static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
{
@@ -707,6 +711,8 @@ static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime,
* samples_to_bytes - Unit conversion of the size from samples to bytes
* @runtime: PCM runtime instance
* @size: size in samples
+ *
+ * Return: the byte size
*/
static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
{
@@ -717,6 +723,8 @@ static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t
* frames_to_bytes - Unit conversion of the size from frames to bytes
* @runtime: PCM runtime instance
* @size: size in frames
+ *
+ * Return: the byte size
*/
static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
{
@@ -727,6 +735,8 @@ static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_s
* frame_aligned - Check whether the byte size is aligned to frames
* @runtime: PCM runtime instance
* @bytes: size in bytes
+ *
+ * Return: true if aligned, or false if not
*/
static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
{
@@ -736,6 +746,8 @@ static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
/**
* snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes
* @substream: PCM substream
+ *
+ * Return: buffer byte size
*/
static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
{
@@ -746,6 +758,8 @@ static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substrea
/**
* snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes
* @substream: PCM substream
+ *
+ * Return: period byte size
*/
static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
{
@@ -758,6 +772,8 @@ static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substrea
* @runtime: PCM runtime instance
*
* Result is between 0 ... (boundary - 1)
+ *
+ * Return: available frame size
*/
static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
{
@@ -774,6 +790,8 @@ static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *r
* @runtime: PCM runtime instance
*
* Result is between 0 ... (boundary - 1)
+ *
+ * Return: available frame size
*/
static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
{
@@ -786,6 +804,8 @@ static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *ru
/**
* snd_pcm_playback_hw_avail - Get the queued space for playback
* @runtime: PCM runtime instance
+ *
+ * Return: available frame size
*/
static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
{
@@ -795,6 +815,8 @@ static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime
/**
* snd_pcm_capture_hw_avail - Get the free space for capture
* @runtime: PCM runtime instance
+ *
+ * Return: available frame size
*/
static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
{
@@ -934,6 +956,8 @@ static inline const struct snd_interval *hw_param_interval_c(const struct snd_pc
/**
* params_channels - Get the number of channels from the hw params
* @p: hw params
+ *
+ * Return: the number of channels
*/
static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
{
@@ -943,6 +967,8 @@ static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
/**
* params_rate - Get the sample rate from the hw params
* @p: hw params
+ *
+ * Return: the sample rate
*/
static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
{
@@ -952,6 +978,8 @@ static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
/**
* params_period_size - Get the period size (in frames) from the hw params
* @p: hw params
+ *
+ * Return: the period size in frames
*/
static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
{
@@ -961,6 +989,8 @@ static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
/**
* params_periods - Get the number of periods from the hw params
* @p: hw params
+ *
+ * Return: the number of periods
*/
static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
{
@@ -970,6 +1000,8 @@ static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
/**
* params_buffer_size - Get the buffer size (in frames) from the hw params
* @p: hw params
+ *
+ * Return: the buffer size in frames
*/
static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
{
@@ -979,6 +1011,8 @@ static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
/**
* params_buffer_bytes - Get the buffer size (in bytes) from the hw params
* @p: hw params
+ *
+ * Return: the buffer size in bytes
*/
static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p)
{
@@ -1241,6 +1275,8 @@ int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type,
* only the given sized buffer and doesn't allow re-allocation nor dynamic
* allocation of a larger buffer unlike the standard one.
* The function may return -ENOMEM error, hence the caller must check it.
+ *
+ * Return: zero if successful, or a negative error code
*/
static inline int __must_check
snd_pcm_set_fixed_buffer(struct snd_pcm_substream *substream, int type,
@@ -1259,6 +1295,8 @@ snd_pcm_set_fixed_buffer(struct snd_pcm_substream *substream, int type,
* Apply the set up of the fixed buffer via snd_pcm_set_fixed_buffer() for
* all substream. If any of allocation fails, it returns -ENOMEM, hence the
* caller must check the return value.
+ *
+ * Return: zero if successful, or a negative error code
*/
static inline int __must_check
snd_pcm_set_fixed_buffer_all(struct snd_pcm *pcm, int type,
@@ -1315,6 +1353,8 @@ static inline int snd_pcm_lib_alloc_vmalloc_32_buffer
* snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset
* @substream: PCM substream
* @ofs: byte offset
+ *
+ * Return: DMA address
*/
static inline dma_addr_t
snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
@@ -1328,6 +1368,8 @@ snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
* @substream: PCM substream
* @ofs: byte offset
* @size: byte size to examine
+ *
+ * Return: chunk size
*/
static inline unsigned int
snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
@@ -1430,6 +1472,8 @@ struct snd_pcm_chmap {
* snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info
* @info: chmap information
* @idx: the substream number index
+ *
+ * Return: the matched PCM substream, or NULL if not found
*/
static inline struct snd_pcm_substream *
snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
@@ -1460,6 +1504,8 @@ int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
/**
* pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise
* @pcm_format: PCM format
+ *
+ * Return: 64bit mask corresponding to the given PCM format
*/
static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
{
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 977d54320a5c..03fc5fa5813e 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -216,6 +216,8 @@ static const char * const snd_pcm_format_names[] = {
/**
* snd_pcm_format_name - Return a name string for the given PCM format
* @format: PCM format
+ *
+ * Return: the format name string
*/
const char *snd_pcm_format_name(snd_pcm_format_t format)
{
@@ -1138,6 +1140,8 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
* This adds the given notifier to the global list so that the callback is
* called for each registered PCM devices. This exists only for PCM OSS
* emulation, so far.
+ *
+ * Return: zero if successful, or a negative error code
*/
int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
{
diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c
index b8296b6eb2c1..7bde7fb64011 100644
--- a/sound/core/pcm_memory.c
+++ b/sound/core/pcm_memory.c
@@ -350,6 +350,8 @@ EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages_for_all);
* SNDRV_DMA_TYPE_VMALLOC type.
*
* Upon successful buffer allocation and setup, the function returns 0.
+ *
+ * Return: zero if successful, or a negative error code
*/
int snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type,
struct device *data, size_t size, size_t max)
@@ -369,6 +371,8 @@ EXPORT_SYMBOL(snd_pcm_set_managed_buffer);
*
* Do pre-allocation to all substreams of the given pcm for the specified DMA
* type and size, and set the managed_buffer_alloc flag to each substream.
+ *
+ * Return: zero if successful, or a negative error code
*/
int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type,
struct device *data,
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 4adaee62ef33..aa0453e51595 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3412,6 +3412,8 @@ static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
* The function is provided primarily for OSS layer and USB gadget drivers,
* and it allows only the limited set of ioctls (hw_params, sw_params,
* prepare, start, drain, drop, forward).
+ *
+ * Return: zero if successful, or a negative error code
*/
int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
unsigned int cmd, void *arg)
@@ -3810,6 +3812,8 @@ static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
*
* This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
* this function is invoked implicitly.
+ *
+ * Return: zero if successful, or a negative error code
*/
int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *area)
@@ -3836,6 +3840,8 @@ EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
* When your hardware uses the iomapped pages as the hardware buffer and
* wants to mmap it, pass this function as mmap pcm_ops. Note that this
* is supposed to work only on limited architectures.
+ *
+ * Return: zero if successful, or a negative error code
*/
int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
struct vm_area_struct *area)
--
2.35.3
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