wireless: add comments about bss refcounting

Should help the next person that tries to understand
the bss refcounting logic.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index dd01b58..ae8c186 100644 (file)
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -523,6 +523,7 @@ static int cmp_bss(struct cfg80211_bss *a,
        }
 }
 
+/* Returned bss is reference counted and must be cleaned up appropriately. */
 struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
                                      struct ieee80211_channel *channel,
                                      const u8 *bssid,
@@ -678,6 +679,7 @@ static bool cfg80211_combine_bsses(struct cfg80211_registered_device *dev,
        return true;
 }
 
+/* Returned bss is reference counted and must be cleaned up appropriately. */
 static struct cfg80211_internal_bss *
 cfg80211_bss_update(struct cfg80211_registered_device *dev,
                    struct cfg80211_internal_bss *tmp)
@@ -866,6 +868,7 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
        return channel;
 }
 
+/* Returned bss is reference counted and must be cleaned up appropriately. */
 struct cfg80211_bss*
 cfg80211_inform_bss(struct wiphy *wiphy,
                    struct ieee80211_channel *channel,
@@ -923,6 +926,7 @@ cfg80211_inform_bss(struct wiphy *wiphy,
 }
 EXPORT_SYMBOL(cfg80211_inform_bss);
 
+/* Returned bss is reference counted and must be cleaned up appropriately. */
 struct cfg80211_bss *
 cfg80211_inform_bss_frame(struct wiphy *wiphy,
                          struct ieee80211_channel *channel,

diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 32dac8c..1d3cfb1 100644 (file)
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -239,6 +239,7 @@ void cfg80211_conn_work(struct work_struct *work)
        rtnl_unlock();
 }
 
+/* Returned bss is reference counted and must be cleaned up appropriately. */
 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 {
        struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
@@ -699,6 +700,7 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 }
 EXPORT_SYMBOL(cfg80211_connect_result);
 
+/* Consumes bss object one way or another */
 void __cfg80211_roamed(struct wireless_dev *wdev,
                       struct cfg80211_bss *bss,
                       const u8 *req_ie, size_t req_ie_len,
@@ -775,6 +777,7 @@ void cfg80211_roamed(struct net_device *dev,
 }
 EXPORT_SYMBOL(cfg80211_roamed);
 
+/* Consumes bss object one way or another */
 void cfg80211_roamed_bss(struct net_device *dev,
                         struct cfg80211_bss *bss, const u8 *req_ie,
                         size_t req_ie_len, const u8 *resp_ie,