[PATCH] rpmsg: Fix documentation return formatting

[PATCH] rpmsg: Fix documentation return formatting

[Arnaud Pouliquen]

kernel documentation specification:
"The return value, if any, should be described in a dedicated section
named Return."

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 drivers/rpmsg/qcom_glink_native.c |  2 +-
 drivers/rpmsg/qcom_smd.c          |  2 +-
 drivers/rpmsg/rpmsg_core.c        | 24 ++++++++++++------------
 drivers/rpmsg/virtio_rpmsg_bus.c  |  2 +-
 4 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 3f377a795b33..1030cfa80e04 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -427,7 +427,7 @@ static void qcom_glink_handle_intent_req_ack(struct qcom_glink *glink,
  * Allocates a local channel id and sends a RPM_CMD_OPEN message to the remote.
  * Will return with refcount held, regardless of outcome.
  *
- * Returns 0 on success, negative errno otherwise.
+ * Return: 0 on success, negative errno otherwise.
  */
 static int qcom_glink_send_open_req(struct qcom_glink *glink,
 				    struct glink_channel *channel)
diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 8da1b5cb31b3..540e027f08c4 100644
--- a/drivers/rpmsg/qcom_smd.c
+++ b/drivers/rpmsg/qcom_smd.c
@@ -1467,7 +1467,7 @@ ATTRIBUTE_GROUPS(qcom_smd_edge);
  * @parent:    parent device for the edge
  * @node:      device_node describing the edge
  *
- * Returns an edge reference, or negative ERR_PTR() on failure.
+ * Return: an edge reference, or negative ERR_PTR() on failure.
  */
 struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
 					     struct device_node *node)
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index d3eb60059ef1..f031b2b1b21c 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -26,7 +26,7 @@
  * @rpdev: rpmsg device
  * @chinfo: channel_info to bind
  *
- * Returns a pointer to the new rpmsg device on success, or NULL on error.
+ * Return: a pointer to the new rpmsg device on success, or NULL on error.
  */
 struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev,
 					  struct rpmsg_channel_info *chinfo)
@@ -48,7 +48,7 @@ EXPORT_SYMBOL(rpmsg_create_channel);
  * @rpdev: rpmsg device
  * @chinfo: channel_info to bind
  *
- * Returns 0 on success or an appropriate error value.
+ * Return: 0 on success or an appropriate error value.
  */
 int rpmsg_release_channel(struct rpmsg_device *rpdev,
 			  struct rpmsg_channel_info *chinfo)
@@ -102,7 +102,7 @@ EXPORT_SYMBOL(rpmsg_release_channel);
  * dynamically assign them an available rpmsg address (drivers should have
  * a very good reason why not to always use RPMSG_ADDR_ANY here).
  *
- * Returns a pointer to the endpoint on success, or NULL on error.
+ * Return: a pointer to the endpoint on success, or NULL on error.
  */
 struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *rpdev,
 					rpmsg_rx_cb_t cb, void *priv,
@@ -146,7 +146,7 @@ EXPORT_SYMBOL(rpmsg_destroy_ept);
  *
  * Can only be called from process context (for now).
  *
- * Returns 0 on success and an appropriate error value on failure.
+ * Return: 0 on success and an appropriate error value on failure.
  */
 int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
 {
@@ -175,7 +175,7 @@ EXPORT_SYMBOL(rpmsg_send);
  *
  * Can only be called from process context (for now).
  *
- * Returns 0 on success and an appropriate error value on failure.
+ * Return: 0 on success and an appropriate error value on failure.
  */
 int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
 {
@@ -206,7 +206,7 @@ EXPORT_SYMBOL(rpmsg_sendto);
  *
  * Can only be called from process context (for now).
  *
- * Returns 0 on success and an appropriate error value on failure.
+ * Return: 0 on success and an appropriate error value on failure.
  */
 int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
 			  void *data, int len)
@@ -235,7 +235,7 @@ EXPORT_SYMBOL(rpmsg_send_offchannel);
  *
  * Can only be called from process context (for now).
  *
- * Returns 0 on success and an appropriate error value on failure.
+ * Return: 0 on success and an appropriate error value on failure.
  */
 int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
 {
@@ -263,7 +263,7 @@ EXPORT_SYMBOL(rpmsg_trysend);
  *
  * Can only be called from process context (for now).
  *
- * Returns 0 on success and an appropriate error value on failure.
+ * Return: 0 on success and an appropriate error value on failure.
  */
 int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
 {
@@ -282,7 +282,7 @@ EXPORT_SYMBOL(rpmsg_trysendto);
  * @filp:	file for poll_wait()
  * @wait:	poll_table for poll_wait()
  *
- * Returns mask representing the current state of the endpoint's send buffers
+ * Return: mask representing the current state of the endpoint's send buffers
  */
 __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp,
 			poll_table *wait)
@@ -313,7 +313,7 @@ EXPORT_SYMBOL(rpmsg_poll);
  *
  * Can only be called from process context (for now).
  *
- * Returns 0 on success and an appropriate error value on failure.
+ * Return: 0 on success and an appropriate error value on failure.
  */
 int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
 			     void *data, int len)
@@ -623,7 +623,7 @@ EXPORT_SYMBOL(rpmsg_unregister_device);
  * @rpdrv: pointer to a struct rpmsg_driver
  * @owner: owning module/driver
  *
- * Returns 0 on success, and an appropriate error value on failure.
+ * Return: 0 on success, and an appropriate error value on failure.
  */
 int __register_rpmsg_driver(struct rpmsg_driver *rpdrv, struct module *owner)
 {
@@ -637,7 +637,7 @@ EXPORT_SYMBOL(__register_rpmsg_driver);
  * unregister_rpmsg_driver() - unregister an rpmsg driver from the rpmsg bus
  * @rpdrv: pointer to a struct rpmsg_driver
  *
- * Returns 0 on success, and an appropriate error value on failure.
+ * Return: 0 on success, and an appropriate error value on failure.
  */
 void unregister_rpmsg_driver(struct rpmsg_driver *rpdrv)
 {
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 9c112aa65040..c37451512835 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -547,7 +547,7 @@ static void rpmsg_downref_sleepers(struct virtproc_info *vrp)
  * should use the appropriate rpmsg_{try}send{to, _offchannel} API
  * (see include/linux/rpmsg.h).
  *
- * Returns 0 on success and an appropriate error value on failure.
+ * Return: 0 on success and an appropriate error value on failure.
  */
 static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev,
 				     u32 src, u32 dst,
-- 
2.17.1

Re: [PATCH] rpmsg: Fix documentation return formatting

[Randy Dunlap]

On 11/8/21 6:01 AM, Arnaud Pouliquen wrote:
> kernel documentation specification:
> "The return value, if any, should be described in a dedicated section
> named Return."
> 
> Signed-off-by: Arnaud Pouliquen<arnaud.pouliquen@foss.st.com>
> ---
>   drivers/rpmsg/qcom_glink_native.c |  2 +-
>   drivers/rpmsg/qcom_smd.c          |  2 +-
>   drivers/rpmsg/rpmsg_core.c        | 24 ++++++++++++------------
>   drivers/rpmsg/virtio_rpmsg_bus.c  |  2 +-
>   4 files changed, 15 insertions(+), 15 deletions(-)

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>

Thanks.

-- 
~Randy

Re: [PATCH] rpmsg: Fix documentation return formatting

[Mathieu Poirier]

On Mon, Nov 08, 2021 at 03:01:26PM +0100, Arnaud Pouliquen wrote:
> kernel documentation specification:
> "The return value, if any, should be described in a dedicated section
> named Return."
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
>  drivers/rpmsg/qcom_glink_native.c |  2 +-
>  drivers/rpmsg/qcom_smd.c          |  2 +-
>  drivers/rpmsg/rpmsg_core.c        | 24 ++++++++++++------------
>  drivers/rpmsg/virtio_rpmsg_bus.c  |  2 +-
>  4 files changed, 15 insertions(+), 15 deletions(-)

I have applied this set.  There is a few more instances in drivers/remoteproc
that could be fixed the same way.

Thanks,
Mathieu

> 
> diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
> index 3f377a795b33..1030cfa80e04 100644
> --- a/drivers/rpmsg/qcom_glink_native.c
> +++ b/drivers/rpmsg/qcom_glink_native.c
> @@ -427,7 +427,7 @@ static void qcom_glink_handle_intent_req_ack(struct qcom_glink *glink,
>   * Allocates a local channel id and sends a RPM_CMD_OPEN message to the remote.
>   * Will return with refcount held, regardless of outcome.
>   *
> - * Returns 0 on success, negative errno otherwise.
> + * Return: 0 on success, negative errno otherwise.
>   */
>  static int qcom_glink_send_open_req(struct qcom_glink *glink,
>  				    struct glink_channel *channel)
> diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
> index 8da1b5cb31b3..540e027f08c4 100644
> --- a/drivers/rpmsg/qcom_smd.c
> +++ b/drivers/rpmsg/qcom_smd.c
> @@ -1467,7 +1467,7 @@ ATTRIBUTE_GROUPS(qcom_smd_edge);
>   * @parent:    parent device for the edge
>   * @node:      device_node describing the edge
>   *
> - * Returns an edge reference, or negative ERR_PTR() on failure.
> + * Return: an edge reference, or negative ERR_PTR() on failure.
>   */
>  struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
>  					     struct device_node *node)
> diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
> index d3eb60059ef1..f031b2b1b21c 100644
> --- a/drivers/rpmsg/rpmsg_core.c
> +++ b/drivers/rpmsg/rpmsg_core.c
> @@ -26,7 +26,7 @@
>   * @rpdev: rpmsg device
>   * @chinfo: channel_info to bind
>   *
> - * Returns a pointer to the new rpmsg device on success, or NULL on error.
> + * Return: a pointer to the new rpmsg device on success, or NULL on error.
>   */
>  struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev,
>  					  struct rpmsg_channel_info *chinfo)
> @@ -48,7 +48,7 @@ EXPORT_SYMBOL(rpmsg_create_channel);
>   * @rpdev: rpmsg device
>   * @chinfo: channel_info to bind
>   *
> - * Returns 0 on success or an appropriate error value.
> + * Return: 0 on success or an appropriate error value.
>   */
>  int rpmsg_release_channel(struct rpmsg_device *rpdev,
>  			  struct rpmsg_channel_info *chinfo)
> @@ -102,7 +102,7 @@ EXPORT_SYMBOL(rpmsg_release_channel);
>   * dynamically assign them an available rpmsg address (drivers should have
>   * a very good reason why not to always use RPMSG_ADDR_ANY here).
>   *
> - * Returns a pointer to the endpoint on success, or NULL on error.
> + * Return: a pointer to the endpoint on success, or NULL on error.
>   */
>  struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *rpdev,
>  					rpmsg_rx_cb_t cb, void *priv,
> @@ -146,7 +146,7 @@ EXPORT_SYMBOL(rpmsg_destroy_ept);
>   *
>   * Can only be called from process context (for now).
>   *
> - * Returns 0 on success and an appropriate error value on failure.
> + * Return: 0 on success and an appropriate error value on failure.
>   */
>  int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
>  {
> @@ -175,7 +175,7 @@ EXPORT_SYMBOL(rpmsg_send);
>   *
>   * Can only be called from process context (for now).
>   *
> - * Returns 0 on success and an appropriate error value on failure.
> + * Return: 0 on success and an appropriate error value on failure.
>   */
>  int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
>  {
> @@ -206,7 +206,7 @@ EXPORT_SYMBOL(rpmsg_sendto);
>   *
>   * Can only be called from process context (for now).
>   *
> - * Returns 0 on success and an appropriate error value on failure.
> + * Return: 0 on success and an appropriate error value on failure.
>   */
>  int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
>  			  void *data, int len)
> @@ -235,7 +235,7 @@ EXPORT_SYMBOL(rpmsg_send_offchannel);
>   *
>   * Can only be called from process context (for now).
>   *
> - * Returns 0 on success and an appropriate error value on failure.
> + * Return: 0 on success and an appropriate error value on failure.
>   */
>  int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
>  {
> @@ -263,7 +263,7 @@ EXPORT_SYMBOL(rpmsg_trysend);
>   *
>   * Can only be called from process context (for now).
>   *
> - * Returns 0 on success and an appropriate error value on failure.
> + * Return: 0 on success and an appropriate error value on failure.
>   */
>  int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
>  {
> @@ -282,7 +282,7 @@ EXPORT_SYMBOL(rpmsg_trysendto);
>   * @filp:	file for poll_wait()
>   * @wait:	poll_table for poll_wait()
>   *
> - * Returns mask representing the current state of the endpoint's send buffers
> + * Return: mask representing the current state of the endpoint's send buffers
>   */
>  __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp,
>  			poll_table *wait)
> @@ -313,7 +313,7 @@ EXPORT_SYMBOL(rpmsg_poll);
>   *
>   * Can only be called from process context (for now).
>   *
> - * Returns 0 on success and an appropriate error value on failure.
> + * Return: 0 on success and an appropriate error value on failure.
>   */
>  int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
>  			     void *data, int len)
> @@ -623,7 +623,7 @@ EXPORT_SYMBOL(rpmsg_unregister_device);
>   * @rpdrv: pointer to a struct rpmsg_driver
>   * @owner: owning module/driver
>   *
> - * Returns 0 on success, and an appropriate error value on failure.
> + * Return: 0 on success, and an appropriate error value on failure.
>   */
>  int __register_rpmsg_driver(struct rpmsg_driver *rpdrv, struct module *owner)
>  {
> @@ -637,7 +637,7 @@ EXPORT_SYMBOL(__register_rpmsg_driver);
>   * unregister_rpmsg_driver() - unregister an rpmsg driver from the rpmsg bus
>   * @rpdrv: pointer to a struct rpmsg_driver
>   *
> - * Returns 0 on success, and an appropriate error value on failure.
> + * Return: 0 on success, and an appropriate error value on failure.
>   */
>  void unregister_rpmsg_driver(struct rpmsg_driver *rpdrv)
>  {
> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
> index 9c112aa65040..c37451512835 100644
> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
> @@ -547,7 +547,7 @@ static void rpmsg_downref_sleepers(struct virtproc_info *vrp)
>   * should use the appropriate rpmsg_{try}send{to, _offchannel} API
>   * (see include/linux/rpmsg.h).
>   *
> - * Returns 0 on success and an appropriate error value on failure.
> + * Return: 0 on success and an appropriate error value on failure.
>   */
>  static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev,
>  				     u32 src, u32 dst,
> -- 
> 2.17.1
> 

Re: [PATCH] rpmsg: Fix documentation return formatting

[Arnaud POULIQUEN]

On 11/18/21 6:38 PM, Mathieu Poirier wrote:
> On Mon, Nov 08, 2021 at 03:01:26PM +0100, Arnaud Pouliquen wrote:
>> kernel documentation specification:
>> "The return value, if any, should be described in a dedicated section
>> named Return."
>>
>> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
>> ---
>>  drivers/rpmsg/qcom_glink_native.c |  2 +-
>>  drivers/rpmsg/qcom_smd.c          |  2 +-
>>  drivers/rpmsg/rpmsg_core.c        | 24 ++++++++++++------------
>>  drivers/rpmsg/virtio_rpmsg_bus.c  |  2 +-
>>  4 files changed, 15 insertions(+), 15 deletions(-)
> 
> I have applied this set.  There is a few more instances in drivers/remoteproc
> that could be fixed the same way.

If nobody fix this before, I will address it when preparing the V2 for my
series on remoteproc virtio restructuring.

Thanks,
Arnaud

> 
> Thanks,
> Mathieu
> 
>>
>> diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
>> index 3f377a795b33..1030cfa80e04 100644
>> --- a/drivers/rpmsg/qcom_glink_native.c
>> +++ b/drivers/rpmsg/qcom_glink_native.c
>> @@ -427,7 +427,7 @@ static void qcom_glink_handle_intent_req_ack(struct qcom_glink *glink,
>>   * Allocates a local channel id and sends a RPM_CMD_OPEN message to the remote.
>>   * Will return with refcount held, regardless of outcome.
>>   *
>> - * Returns 0 on success, negative errno otherwise.
>> + * Return: 0 on success, negative errno otherwise.
>>   */
>>  static int qcom_glink_send_open_req(struct qcom_glink *glink,
>>  				    struct glink_channel *channel)
>> diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
>> index 8da1b5cb31b3..540e027f08c4 100644
>> --- a/drivers/rpmsg/qcom_smd.c
>> +++ b/drivers/rpmsg/qcom_smd.c
>> @@ -1467,7 +1467,7 @@ ATTRIBUTE_GROUPS(qcom_smd_edge);
>>   * @parent:    parent device for the edge
>>   * @node:      device_node describing the edge
>>   *
>> - * Returns an edge reference, or negative ERR_PTR() on failure.
>> + * Return: an edge reference, or negative ERR_PTR() on failure.
>>   */
>>  struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
>>  					     struct device_node *node)
>> diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
>> index d3eb60059ef1..f031b2b1b21c 100644
>> --- a/drivers/rpmsg/rpmsg_core.c
>> +++ b/drivers/rpmsg/rpmsg_core.c
>> @@ -26,7 +26,7 @@
>>   * @rpdev: rpmsg device
>>   * @chinfo: channel_info to bind
>>   *
>> - * Returns a pointer to the new rpmsg device on success, or NULL on error.
>> + * Return: a pointer to the new rpmsg device on success, or NULL on error.
>>   */
>>  struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev,
>>  					  struct rpmsg_channel_info *chinfo)
>> @@ -48,7 +48,7 @@ EXPORT_SYMBOL(rpmsg_create_channel);
>>   * @rpdev: rpmsg device
>>   * @chinfo: channel_info to bind
>>   *
>> - * Returns 0 on success or an appropriate error value.
>> + * Return: 0 on success or an appropriate error value.
>>   */
>>  int rpmsg_release_channel(struct rpmsg_device *rpdev,
>>  			  struct rpmsg_channel_info *chinfo)
>> @@ -102,7 +102,7 @@ EXPORT_SYMBOL(rpmsg_release_channel);
>>   * dynamically assign them an available rpmsg address (drivers should have
>>   * a very good reason why not to always use RPMSG_ADDR_ANY here).
>>   *
>> - * Returns a pointer to the endpoint on success, or NULL on error.
>> + * Return: a pointer to the endpoint on success, or NULL on error.
>>   */
>>  struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *rpdev,
>>  					rpmsg_rx_cb_t cb, void *priv,
>> @@ -146,7 +146,7 @@ EXPORT_SYMBOL(rpmsg_destroy_ept);
>>   *
>>   * Can only be called from process context (for now).
>>   *
>> - * Returns 0 on success and an appropriate error value on failure.
>> + * Return: 0 on success and an appropriate error value on failure.
>>   */
>>  int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
>>  {
>> @@ -175,7 +175,7 @@ EXPORT_SYMBOL(rpmsg_send);
>>   *
>>   * Can only be called from process context (for now).
>>   *
>> - * Returns 0 on success and an appropriate error value on failure.
>> + * Return: 0 on success and an appropriate error value on failure.
>>   */
>>  int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
>>  {
>> @@ -206,7 +206,7 @@ EXPORT_SYMBOL(rpmsg_sendto);
>>   *
>>   * Can only be called from process context (for now).
>>   *
>> - * Returns 0 on success and an appropriate error value on failure.
>> + * Return: 0 on success and an appropriate error value on failure.
>>   */
>>  int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
>>  			  void *data, int len)
>> @@ -235,7 +235,7 @@ EXPORT_SYMBOL(rpmsg_send_offchannel);
>>   *
>>   * Can only be called from process context (for now).
>>   *
>> - * Returns 0 on success and an appropriate error value on failure.
>> + * Return: 0 on success and an appropriate error value on failure.
>>   */
>>  int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
>>  {
>> @@ -263,7 +263,7 @@ EXPORT_SYMBOL(rpmsg_trysend);
>>   *
>>   * Can only be called from process context (for now).
>>   *
>> - * Returns 0 on success and an appropriate error value on failure.
>> + * Return: 0 on success and an appropriate error value on failure.
>>   */
>>  int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
>>  {
>> @@ -282,7 +282,7 @@ EXPORT_SYMBOL(rpmsg_trysendto);
>>   * @filp:	file for poll_wait()
>>   * @wait:	poll_table for poll_wait()
>>   *
>> - * Returns mask representing the current state of the endpoint's send buffers
>> + * Return: mask representing the current state of the endpoint's send buffers
>>   */
>>  __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp,
>>  			poll_table *wait)
>> @@ -313,7 +313,7 @@ EXPORT_SYMBOL(rpmsg_poll);
>>   *
>>   * Can only be called from process context (for now).
>>   *
>> - * Returns 0 on success and an appropriate error value on failure.
>> + * Return: 0 on success and an appropriate error value on failure.
>>   */
>>  int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
>>  			     void *data, int len)
>> @@ -623,7 +623,7 @@ EXPORT_SYMBOL(rpmsg_unregister_device);
>>   * @rpdrv: pointer to a struct rpmsg_driver
>>   * @owner: owning module/driver
>>   *
>> - * Returns 0 on success, and an appropriate error value on failure.
>> + * Return: 0 on success, and an appropriate error value on failure.
>>   */
>>  int __register_rpmsg_driver(struct rpmsg_driver *rpdrv, struct module *owner)
>>  {
>> @@ -637,7 +637,7 @@ EXPORT_SYMBOL(__register_rpmsg_driver);
>>   * unregister_rpmsg_driver() - unregister an rpmsg driver from the rpmsg bus
>>   * @rpdrv: pointer to a struct rpmsg_driver
>>   *
>> - * Returns 0 on success, and an appropriate error value on failure.
>> + * Return: 0 on success, and an appropriate error value on failure.
>>   */
>>  void unregister_rpmsg_driver(struct rpmsg_driver *rpdrv)
>>  {
>> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
>> index 9c112aa65040..c37451512835 100644
>> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
>> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
>> @@ -547,7 +547,7 @@ static void rpmsg_downref_sleepers(struct virtproc_info *vrp)
>>   * should use the appropriate rpmsg_{try}send{to, _offchannel} API
>>   * (see include/linux/rpmsg.h).
>>   *
>> - * Returns 0 on success and an appropriate error value on failure.
>> + * Return: 0 on success and an appropriate error value on failure.
>>   */
>>  static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev,
>>  				     u32 src, u32 dst,
>> -- 
>> 2.17.1
>>