cfg80211: free_priv for BSS info

When cfg80211 users have their own allocated data in the per-BSS
private data, they will need to free this when the BSS struct is
destroyed. Add a free_priv method and fix one place where the BSS
was kfree'd rather than released properly.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 5 insertions, 1 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 09a0b268e5cf..b514abcc2b93 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -567,6 +567,7 @@ enum cfg80211_signal_type {
  * @len_information_elements: total length of the information elements
  * @signal: signal strength value
  * @signal_type: signal type
+ * @free_priv: function pointer to free private data
  * @priv: private area for driver use, has at least wiphy->bss_priv_size bytes
  */
 struct cfg80211_bss {
@@ -582,6 +583,7 @@ struct cfg80211_bss {
         s32 signal;
         enum cfg80211_signal_type signal_type;
 
+        void (*free_priv)(struct cfg80211_bss *bss);
         u8 priv[0] __attribute__((__aligned__(sizeof(void *))));
 };
 
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 3cccd1390cea..0668b2bfc1da 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -376,7 +376,7 @@ void cfg80211_dev_free(struct cfg80211_registered_device *drv)
         mutex_destroy(&drv->mtx);
         mutex_destroy(&drv->devlist_mtx);
         list_for_each_entry_safe(scan, tmp, &drv->bss_list, list)
-                kfree(scan);
+                cfg80211_put_bss(&scan->pub);
         kfree(drv);
 }
 
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 009d12810c55..ec148f68a62b 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -56,6 +56,8 @@ static void bss_release(struct kref *ref)
         struct cfg80211_internal_bss *bss;
 
         bss = container_of(ref, struct cfg80211_internal_bss, ref);
+        if (bss->pub.free_priv)
+                bss->pub.free_priv(&bss->pub);
         kfree(bss);
 }