4 files changed, 16 insertions, 0 deletions

diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index e5570e011116..369515231302 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -42,6 +42,14 @@ struct cfg802154_ops {
 struct wpan_phy {
         struct mutex pib_lock;
 
+        /* If multiple wpan_phys are registered and you're handed e.g.
+         * a regular netdev with assigned ieee802154_ptr, you won't
+         * know whether it points to a wpan_phy your driver has registered
+         * or not. Assign this to something global to your driver to
+         * help determine whether you own this wpan_phy or not.
+         */
+        const void *privid;
+
         /*
          * This is a PIB according to 802.15.4-2011.
          * We do not provide timing-related variables, as they
diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h
index abb19701d494..4be5e23c7e8b 100644
--- a/net/mac802154/ieee802154_i.h
+++ b/net/mac802154/ieee802154_i.h
@@ -96,6 +96,9 @@ struct ieee802154_sub_if_data {
 
 #define MAC802154_CHAN_NONE             0xff /* No channel is assigned */
 
+/* utility functions/constants */
+extern const void *const mac802154_wpan_phy_privid; /*  for wpan_phy privid */
+
 static inline struct ieee802154_local *
 hw_to_local(struct ieee802154_hw *hw)
 {
diff --git a/net/mac802154/main.c b/net/mac802154/main.c
index 709dcc5f7f17..24e8ca6a669d 100644
--- a/net/mac802154/main.c
+++ b/net/mac802154/main.c
@@ -92,6 +92,8 @@ ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
                 return NULL;
         }
 
+        phy->privid = mac802154_wpan_phy_privid;
+
         local = wpan_phy_priv(phy);
         local->phy = phy;
         local->hw.phy = local->phy;
diff --git a/net/mac802154/util.c b/net/mac802154/util.c
index 117e4eff4ca8..9a04e4a8e50f 100644
--- a/net/mac802154/util.c
+++ b/net/mac802154/util.c
@@ -15,6 +15,9 @@
 
 #include "ieee802154_i.h"
 
+/* privid for wpan_phys to determine whether they belong to us or not */
+const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
+
 void ieee802154_wake_queue(struct ieee802154_hw *hw)
 {
         struct ieee802154_local *local = hw_to_local(hw);