hwspinlock/core: fix kernel-doc warnings

  Correct function comments to prevent kernel-doc warnings
found when using "W=1".

hwspinlock_core.c:208: warning: Excess function parameter 'timeout' description in '__hwspin_lock_timeout'
hwspinlock_core.c:318: warning: Excess function parameter 'bank' description in 'of_hwspin_lock_simple_xlate'
hwspinlock_core.c:647: warning: Function parameter or member 'hwlock' not described in '__hwspin_lock_request'

and 17 warnings like:
hwspinlock_core.c:487: warning: No description found for return value of 'hwspin_lock_register'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Baolin Wang <baolin.wang7@gmail.com>
Cc: linux-remoteproc@vger.kernel.org
---
 drivers/hwspinlock/hwspinlock_core.c |   53 +++++++++++++------------
 1 file changed, 29 insertions(+), 24 deletions(-)
  

On Tue, Dec 05, 2023 at 09:54:39PM -0800, Randy Dunlap wrote:
> diff -- a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
> --- a/drivers/hwspinlock/hwspinlock_core.c
> +++ b/drivers/hwspinlock/hwspinlock_core.c
> @@ -84,8 +84,9 @@ static DEFINE_MUTEX(hwspinlock_tree_lock
>   * should decide between spin_trylock, spin_trylock_irq and
>   * spin_trylock_irqsave.
>   *
> - * Returns 0 if we successfully locked the hwspinlock or -EBUSY if
> + * Returns: %0 if we successfully locked the hwspinlock or -EBUSY if
>   * the hwspinlock was already taken.
> + *
>   * This function will never sleep.
>   */
>  int __hwspin_trylock(struct hwspinlock *hwlock, int mode, unsigned long *flags)
> @@ -171,7 +172,7 @@ EXPORT_SYMBOL_GPL(__hwspin_trylock);
>  /**
>   * __hwspin_lock_timeout() - lock an hwspinlock with timeout limit
>   * @hwlock: the hwspinlock to be locked
> - * @timeout: timeout value in msecs
> + * @to: timeout value in msecs
>   * @mode: mode which controls whether local interrupts are disabled or not
>   * @flags: a pointer to where the caller's interrupt state will be saved at (if
>   *         requested)
> @@ -199,9 +200,11 @@ EXPORT_SYMBOL_GPL(__hwspin_trylock);
>   * to choose the appropriate @mode of operation, exactly the same way users
>   * should decide between spin_lock, spin_lock_irq and spin_lock_irqsave.
>   *
> - * Returns 0 when the @hwlock was successfully taken, and an appropriate
> + * Returns: %0 when the @hwlock was successfully taken, and an appropriate
>   * error code otherwise (most notably -ETIMEDOUT if the @hwlock is still
> - * busy after @timeout msecs). The function will never sleep.
> + * busy after @timeout msecs).
> + *
> + * The function will never sleep.
>   */
>  int __hwspin_lock_timeout(struct hwspinlock *hwlock, unsigned int to,
>  					int mode, unsigned long *flags)
> @@ -304,13 +307,12 @@ EXPORT_SYMBOL_GPL(__hwspin_unlock);
>  
>  /**
>   * of_hwspin_lock_simple_xlate - translate hwlock_spec to return a lock id
> - * @bank: the hwspinlock device bank
>   * @hwlock_spec: hwlock specifier as found in the device tree
>   *
>   * This is a simple translation function, suitable for hwspinlock platform
>   * drivers that only has a lock specifier length of 1.
>   *
> - * Returns a relative index of the lock within a specified bank on success,
> + * Returns: a relative index of the lock within a specified bank on success,
>   * or -EINVAL on invalid specifier cell count.
>   */
>  static inline int
> @@ -332,9 +334,10 @@ of_hwspin_lock_simple_xlate(const struct
>   * hwspinlock device, so that it can be requested using the normal
>   * hwspin_lock_request_specific() API.
>   *
> - * Returns the global lock id number on success, -EPROBE_DEFER if the hwspinlock
> - * device is not yet registered, -EINVAL on invalid args specifier value or an
> - * appropriate error as returned from the OF parsing of the DT client node.
> + * Returns: the global lock id number on success, -EPROBE_DEFER if the
> + * hwspinlock device is not yet registered, -EINVAL on invalid args
> + * specifier value or an appropriate error as returned from the OF parsing
> + * of the DT client node.
>   */
>  int of_hwspin_lock_get_id(struct device_node *np, int index)
>  {
> @@ -399,9 +402,10 @@ EXPORT_SYMBOL_GPL(of_hwspin_lock_get_id)
>   * the hwspinlock device, so that it can be requested using the normal
>   * hwspin_lock_request_specific() API.
>   *
> - * Returns the global lock id number on success, -EPROBE_DEFER if the hwspinlock
> - * device is not yet registered, -EINVAL on invalid args specifier value or an
> - * appropriate error as returned from the OF parsing of the DT client node.
> + * Returns: the global lock id number on success, -EPROBE_DEFER if the
> + * hwspinlock device is not yet registered, -EINVAL on invalid args
> + * specifier value or an appropriate error as returned from the OF parsing
> + * of the DT client node.
>   */
>  int of_hwspin_lock_get_id_byname(struct device_node *np, const char *name)
>  {
> @@ -481,7 +485,7 @@ out:
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns 0 on success, or an appropriate error code on failure
> + * Returns: %0 on success, or an appropriate error code on failure
>   */
>  int hwspin_lock_register(struct hwspinlock_device *bank, struct device *dev,
>  		const struct hwspinlock_ops *ops, int base_id, int num_locks)
> @@ -529,7 +533,7 @@ EXPORT_SYMBOL_GPL(hwspin_lock_register);
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns 0 on success, or an appropriate error code on failure
> + * Returns: %0 on success, or an appropriate error code on failure
>   */
>  int hwspin_lock_unregister(struct hwspinlock_device *bank)
>  {
> @@ -578,7 +582,7 @@ static int devm_hwspin_lock_device_match
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns 0 on success, or an appropriate error code on failure
> + * Returns: %0 on success, or an appropriate error code on failure
>   */
>  int devm_hwspin_lock_unregister(struct device *dev,
>  				struct hwspinlock_device *bank)
> @@ -607,7 +611,7 @@ EXPORT_SYMBOL_GPL(devm_hwspin_lock_unreg
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns 0 on success, or an appropriate error code on failure
> + * Returns: %0 on success, or an appropriate error code on failure
>   */
>  int devm_hwspin_lock_register(struct device *dev,
>  			      struct hwspinlock_device *bank,
> @@ -635,12 +639,13 @@ EXPORT_SYMBOL_GPL(devm_hwspin_lock_regis
>  
>  /**
>   * __hwspin_lock_request() - tag an hwspinlock as used and power it up
> + * @hwlock: the target hwspinlock
>   *
>   * This is an internal function that prepares an hwspinlock instance
>   * before it is given to the user. The function assumes that
>   * hwspinlock_tree_lock is taken.
>   *
> - * Returns 0 or positive to indicate success, and a negative value to
> + * Returns: %0 or positive to indicate success, and a negative value to
>   * indicate an error (with the appropriate error code)
>   */
>  static int __hwspin_lock_request(struct hwspinlock *hwlock)
> @@ -680,7 +685,7 @@ static int __hwspin_lock_request(struct
>   * hwspin_lock_get_id() - retrieve id number of a given hwspinlock
>   * @hwlock: a valid hwspinlock instance
>   *
> - * Returns the id number of a given @hwlock, or -EINVAL if @hwlock is invalid.
> + * Returns: the id number of a given @hwlock, or -EINVAL if @hwlock is invalid.
>   */
>  int hwspin_lock_get_id(struct hwspinlock *hwlock)
>  {
> @@ -704,7 +709,7 @@ EXPORT_SYMBOL_GPL(hwspin_lock_get_id);
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns the address of the assigned hwspinlock, or NULL on error
> + * Returns: the address of the assigned hwspinlock, or %NULL on error
>   */
>  struct hwspinlock *hwspin_lock_request(void)
>  {
> @@ -747,7 +752,7 @@ EXPORT_SYMBOL_GPL(hwspin_lock_request);
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns the address of the assigned hwspinlock, or NULL on error
> + * Returns: the address of the assigned hwspinlock, or %NULL on error
>   */
>  struct hwspinlock *hwspin_lock_request_specific(unsigned int id)
>  {
> @@ -795,7 +800,7 @@ EXPORT_SYMBOL_GPL(hwspin_lock_request_sp
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns 0 on success, or an appropriate error code on failure
> + * Returns: %0 on success, or an appropriate error code on failure
>   */
>  int hwspin_lock_free(struct hwspinlock *hwlock)
>  {
> @@ -865,7 +870,7 @@ static void devm_hwspin_lock_release(str
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns 0 on success, or an appropriate error code on failure
> + * Returns: %0 on success, or an appropriate error code on failure
>   */
>  int devm_hwspin_lock_free(struct device *dev, struct hwspinlock *hwlock)
>  {
> @@ -891,7 +896,7 @@ EXPORT_SYMBOL_GPL(devm_hwspin_lock_free)
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns the address of the assigned hwspinlock, or NULL on error
> + * Returns: the address of the assigned hwspinlock, or %NULL on error
>   */
>  struct hwspinlock *devm_hwspin_lock_request(struct device *dev)
>  {
> @@ -926,7 +931,7 @@ EXPORT_SYMBOL_GPL(devm_hwspin_lock_reque
>   *
>   * Should be called from a process context (might sleep)
>   *
> - * Returns the address of the assigned hwspinlock, or NULL on error
> + * Returns: the address of the assigned hwspinlock, or %NULL on error
>   */
>  struct hwspinlock *devm_hwspin_lock_request_specific(struct device *dev,
>  						     unsigned int id)

LGTM, thanks!

Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>