wifi: mac80211: Add missing return value documentation

kernel-doc is reporting some warnings, so fix them:

% scripts/kernel-doc -Wall -Werror -none include/net/mac80211.h
include/net/mac80211.h:2056: warning: No description found for return value of 'wdev_to_ieee80211_vif'
include/net/mac80211.h:2066: warning: No description found for return value of 'ieee80211_vif_to_wdev'
include/net/mac80211.h:5603: warning: No description found for return value of 'ieee80211_beacon_cntdwn_is_complete'
include/net/mac80211.h:5968: warning: No description found for return value of 'ieee80211_gtk_rekey_add'
include/net/mac80211.h:6350: warning: No description found for return value of 'ieee80211_find_sta_by_link_addrs'
include/net/mac80211.h:6478: warning: No description found for return value of 'ieee80211_txq_airtime_check'
include/net/mac80211.h:6981: warning: No description found for return value of 'rate_control_set_rates'
include/net/mac80211.h:7142: warning: No description found for return value of 'ieee80211_tx_prepare_skb'
include/net/mac80211.h:7156: warning: No description found for return value of 'ieee80211_parse_tx_radiotap'
include/net/mac80211.h:7277: warning: No description found for return value of 'ieee80211_tx_dequeue'
include/net/mac80211.h:7292: warning: No description found for return value of 'ieee80211_tx_dequeue_ni'
include/net/mac80211.h:7324: warning: No description found for return value of 'ieee80211_next_txq'
include/net/mac80211.h:7405: warning: No description found for return value of 'ieee80211_txq_may_transmit'
include/net/mac80211.h:7466: warning: No description found for return value of 'ieee80211_calc_rx_airtime'
include/net/mac80211.h:7480: warning: No description found for return value of 'ieee80211_calc_tx_airtime'
include/net/mac80211.h:7528: warning: No description found for return value of 'ieee80211_is_tx_data'
include/net/mac80211.h:7562: warning: No description found for return value of 'ieee80211_set_active_links'
17 warnings as Errors
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://msgid.link/20240329-mac80211-kdoc-retval-v1-2-5e4d1ad6c250@quicinc.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/mac80211.h

@@ -2051,7 +2051,7 @@ static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
  * This can be used by mac80211 drivers with direct cfg80211 APIs
  * (like the vendor commands) that get a wdev.
  *
- * Note that this function may return %NULL if the given wdev isn't
+ * Return: pointer to the wdev, or %NULL if the given wdev isn't
  * associated with a vif that the driver knows about (e.g. monitor
  * or AP_VLAN interfaces.)
  */
@@ -2064,6 +2064,8 @@ struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev);
  * This can be used by mac80211 drivers with direct cfg80211 APIs
  * (like the vendor commands) that needs to get the wdev for a vif.
  * This can also be useful to get the netdev associated to a vif.
+ *
+ * Return: pointer to the wdev
  */
 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif);
 
@@ -5602,7 +5604,7 @@ void ieee80211_csa_finish(struct ieee80211_vif *vif, unsigned int link_id);
  * @vif: &struct ieee80211_vif pointer from the add_interface callback.
  * @link_id: valid link_id during MLO or 0 for non-MLO
  *
- * This function returns whether the countdown reached zero.
+ * Return: %true if the countdown reached 1, %false otherwise
  */
 bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif,
 					 unsigned int link_id);
@@ -5947,8 +5949,8 @@ void ieee80211_remove_key(struct ieee80211_key_conf *keyconf);
  * key(s) will be available. These will be needed by mac80211 for proper
  * RX processing, so this function allows setting them.
  *
- * The function returns the newly allocated key structure, which will
- * have similar contents to the passed key configuration but point to
+ * Return: the newly allocated key structure, which will have
+ * similar contents to the passed key configuration but point to
  * mac80211-owned memory. In case of errors, the function returns an
  * ERR_PTR(), use IS_ERR() etc.
  *
@@ -6347,6 +6349,8 @@ struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
  *	may be %NULL if the link ID is not needed
  *
  * Obtain the STA by link address, must use RCU protection.
+ *
+ * Return: pointer to STA if found, otherwise %NULL.
  */
 struct ieee80211_sta *
 ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw,
@@ -6476,8 +6480,8 @@ void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
  * @hw: pointer obtained from ieee80211_alloc_hw()
  * @txq: pointer obtained from station or virtual interface
  *
- * Return true if the AQL's airtime limit has not been reached and the txq can
- * continue to send more packets to the device. Otherwise return false.
+ * Return: %true if the AQL's airtime limit has not been reached and the txq can
+ * continue to send more packets to the device. Otherwise return %false.
  */
 bool
 ieee80211_txq_airtime_check(struct ieee80211_hw *hw, struct ieee80211_txq *txq);
@@ -6980,6 +6984,8 @@ bool rate_usable_index_exists(struct ieee80211_supported_band *sband,
  * @hw: pointer as obtained from ieee80211_alloc_hw()
  * @pubsta: &struct ieee80211_sta pointer to the target destination.
  * @rates: new tx rate set to be used for this station.
+ *
+ * Return: 0 on success. An error code otherwise.
  */
 int rate_control_set_rates(struct ieee80211_hw *hw,
 			   struct ieee80211_sta *pubsta,
@@ -7140,6 +7146,8 @@ void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
  * @band: the band to transmit on
  * @sta: optional pointer to get the station to send the frame to
  *
+ * Return: %true if the skb was prepared, %false otherwise
+ *
  * Note: must be called under RCU lock
  */
 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
@@ -7156,6 +7164,8 @@ bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
  *
  * @skb: packet injected by userspace
  * @dev: the &struct device of this 802.11 device
+ *
+ * Return: %true if the radiotap header was parsed, %false otherwise
  */
 bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
 				 struct net_device *dev);
@@ -7265,7 +7275,7 @@ void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid);
  * @txq: pointer obtained from station or virtual interface, or from
  *	ieee80211_next_txq()
  *
- * Returns the skb if successful, %NULL if no frame was available.
+ * Return: the skb if successful, %NULL if no frame was available.
  *
  * Note that this must be called in an rcu_read_lock() critical section,
  * which can only be released after the SKB was handled. Some pointers in
@@ -7291,6 +7301,8 @@ struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
  * @hw: pointer as obtained from ieee80211_alloc_hw()
  * @txq: pointer obtained from station or virtual interface, or from
  *	ieee80211_next_txq()
+ *
+ * Return: the skb if successful, %NULL if no frame was available.
  */
 static inline struct sk_buff *ieee80211_tx_dequeue_ni(struct ieee80211_hw *hw,
 						      struct ieee80211_txq *txq)
@@ -7322,7 +7334,7 @@ void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
  * @hw: pointer as obtained from ieee80211_alloc_hw()
  * @ac: AC number to return packets from.
  *
- * Returns the next txq if successful, %NULL if no queue is eligible. If a txq
+ * Return: the next txq if successful, %NULL if no queue is eligible. If a txq
  * is returned, it should be returned with ieee80211_return_txq() after the
  * driver has finished scheduling it.
  */
@@ -7405,6 +7417,8 @@ ieee80211_return_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq,
  *
  * @hw: pointer as obtained from ieee80211_alloc_hw()
  * @txq: pointer obtained from station or virtual interface
+ *
+ * Return: %true if transmission is allowed, %false otherwise
  */
 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
 				struct ieee80211_txq *txq);
@@ -7465,6 +7479,8 @@ void ieee80211_nan_func_match(struct ieee80211_vif *vif,
  * @status: &struct ieee80211_rx_status containing the transmission rate
  *          information.
  * @len: frame length in bytes
+ *
+ * Return: the airtime estimate
  */
 u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
 			      struct ieee80211_rx_status *status,
@@ -7479,6 +7495,8 @@ u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
  * @hw: pointer as obtained from ieee80211_alloc_hw()
  * @info: &struct ieee80211_tx_info of the frame.
  * @len: frame length in bytes
+ *
+ * Return: the airtime estimate
  */
 u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw,
 			      struct ieee80211_tx_info *info,
@@ -7528,6 +7546,8 @@ ieee80211_obss_color_collision_notify(struct ieee80211_vif *vif,
  * hardware encapsulation enabled are data frames.
  *
  * @skb: the frame to be transmitted.
+ *
+ * Return: %true if @skb is a data frame, %false otherwise
  */
 static inline bool ieee80211_is_tx_data(struct sk_buff *skb)
 {
@@ -7563,6 +7583,8 @@ static inline bool ieee80211_is_tx_data(struct sk_buff *skb)
  *  - change_sta_links(0x10) for each affected STA (the AP)
  *  - assign_vif_chanctx(link_id=4)
  *  - change_vif_links(0x10)
+ *
+ * Return: 0 on success. An error code otherwise.
  */
 int ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links);