mac80211: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

11 files changed, 50 insertions, 59 deletions

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index e9c6aa3ed05b..db07e0de9a03 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1711,10 +1711,10 @@ void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata)
         sdata_unlock(sdata);
 }
 
-static void ieee80211_ibss_timer(unsigned long data)
+static void ieee80211_ibss_timer(struct timer_list *t)
 {
         struct ieee80211_sub_if_data *sdata =
-                (struct ieee80211_sub_if_data *) data;
+                from_timer(sdata, t, u.ibss.timer);
 
         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 }
@@ -1723,8 +1723,7 @@ void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
 {
         struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
-        setup_timer(&ifibss->timer, ieee80211_ibss_timer,
-                    (unsigned long) sdata);
+        timer_setup(&ifibss->timer, ieee80211_ibss_timer, 0);
         INIT_LIST_HEAD(&ifibss->incomplete_stations);
         spin_lock_init(&ifibss->incomplete_lock);
         INIT_WORK(&ifibss->csa_connection_drop_work,
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 68f874e73561..885d00b41911 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1057,6 +1057,7 @@ struct tpt_led_trigger {
         const struct ieee80211_tpt_blink *blink_table;
         unsigned int blink_table_len;
         struct timer_list timer;
+        struct ieee80211_local *local;
         unsigned long prev_traffic;
         unsigned long tx_bytes, rx_bytes;
         unsigned int active, want;
@@ -1932,7 +1933,7 @@ static inline int ieee80211_ac_from_tid(int tid)
 
 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
-void ieee80211_dynamic_ps_timer(unsigned long data);
+void ieee80211_dynamic_ps_timer(struct timer_list *t);
 void ieee80211_send_nullfunc(struct ieee80211_local *local,
                              struct ieee80211_sub_if_data *sdata,
                              bool powersave);
diff --git a/net/mac80211/led.c b/net/mac80211/led.c
index 0505845b7ab8..ba0b507ea691 100644
--- a/net/mac80211/led.c
+++ b/net/mac80211/led.c
@@ -248,10 +248,10 @@ static unsigned long tpt_trig_traffic(struct ieee80211_local *local,
         return DIV_ROUND_UP(delta, 1024 / 8);
 }
 
-static void tpt_trig_timer(unsigned long data)
+static void tpt_trig_timer(struct timer_list *t)
 {
-        struct ieee80211_local *local = (void *)data;
-        struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+        struct tpt_led_trigger *tpt_trig = from_timer(tpt_trig, t, timer);
+        struct ieee80211_local *local = tpt_trig->local;
         struct led_classdev *led_cdev;
         unsigned long on, off, tpt;
         int i;
@@ -306,8 +306,9 @@ __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
         tpt_trig->blink_table = blink_table;
         tpt_trig->blink_table_len = blink_table_len;
         tpt_trig->want = flags;
+        tpt_trig->local = local;
 
-        setup_timer(&tpt_trig->timer, tpt_trig_timer, (unsigned long)local);
+        timer_setup(&tpt_trig->timer, tpt_trig_timer, 0);
 
         local->tpt_led_trigger = tpt_trig;
 
@@ -326,7 +327,7 @@ static void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
         tpt_trig_traffic(local, tpt_trig);
         tpt_trig->running = true;
 
-        tpt_trig_timer((unsigned long)local);
+        tpt_trig_timer(&tpt_trig->timer);
         mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
 }
 
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 8aa1f5b6a051..e054a2fd8d38 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -633,8 +633,7 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
                   ieee80211_dynamic_ps_enable_work);
         INIT_WORK(&local->dynamic_ps_disable_work,
                   ieee80211_dynamic_ps_disable_work);
-        setup_timer(&local->dynamic_ps_timer,
-                    ieee80211_dynamic_ps_timer, (unsigned long) local);
+        timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 
         INIT_WORK(&local->sched_scan_stopped_work,
                   ieee80211_sched_scan_stopped_work);
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 7a76c4a6df30..5e27364e10ac 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -37,9 +37,10 @@ void ieee80211s_stop(void)
         kmem_cache_destroy(rm_cache);
 }
 
-static void ieee80211_mesh_housekeeping_timer(unsigned long data)
+static void ieee80211_mesh_housekeeping_timer(struct timer_list *t)
 {
-        struct ieee80211_sub_if_data *sdata = (void *) data;
+        struct ieee80211_sub_if_data *sdata =
+                from_timer(sdata, t, u.mesh.housekeeping_timer);
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 
@@ -528,18 +529,18 @@ int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
         return 0;
 }
 
-static void ieee80211_mesh_path_timer(unsigned long data)
+static void ieee80211_mesh_path_timer(struct timer_list *t)
 {
         struct ieee80211_sub_if_data *sdata =
-                (struct ieee80211_sub_if_data *) data;
+                from_timer(sdata, t, u.mesh.mesh_path_timer);
 
         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 }
 
-static void ieee80211_mesh_path_root_timer(unsigned long data)
+static void ieee80211_mesh_path_root_timer(struct timer_list *t)
 {
         struct ieee80211_sub_if_data *sdata =
-                (struct ieee80211_sub_if_data *) data;
+                from_timer(sdata, t, u.mesh.mesh_path_root_timer);
         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 
         set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
@@ -1442,9 +1443,8 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
         static u8 zero_addr[ETH_ALEN] = {};
 
-        setup_timer(&ifmsh->housekeeping_timer,
-                    ieee80211_mesh_housekeeping_timer,
-                    (unsigned long) sdata);
+        timer_setup(&ifmsh->housekeeping_timer,
+                    ieee80211_mesh_housekeeping_timer, 0);
 
         ifmsh->accepting_plinks = true;
         atomic_set(&ifmsh->mpaths, 0);
@@ -1458,12 +1458,9 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
 
         mesh_pathtbl_init(sdata);
 
-        setup_timer(&ifmsh->mesh_path_timer,
-                    ieee80211_mesh_path_timer,
-                    (unsigned long) sdata);
-        setup_timer(&ifmsh->mesh_path_root_timer,
-                    ieee80211_mesh_path_root_timer,
-                    (unsigned long) sdata);
+        timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0);
+        timer_setup(&ifmsh->mesh_path_root_timer,
+                    ieee80211_mesh_path_root_timer, 0);
         INIT_LIST_HEAD(&ifmsh->preq_queue.list);
         skb_queue_head_init(&ifmsh->ps.bc_buf);
         spin_lock_init(&ifmsh->mesh_preq_queue_lock);
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 465b7853edc0..ee56f18cad3f 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -296,7 +296,7 @@ void mesh_path_tx_pending(struct mesh_path *mpath);
 int mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata);
 void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata);
 int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr);
-void mesh_path_timer(unsigned long data);
+void mesh_path_timer(struct timer_list *t);
 void mesh_path_flush_by_nexthop(struct sta_info *sta);
 void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
                              struct sk_buff *skb);
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 146ec6c0f12f..4f7826d7b47c 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -1194,9 +1194,9 @@ endlookup:
         return err;
 }
 
-void mesh_path_timer(unsigned long data)
+void mesh_path_timer(struct timer_list *t)
 {
-        struct mesh_path *mpath = (void *) data;
+        struct mesh_path *mpath = from_timer(mpath, t, timer);
         struct ieee80211_sub_if_data *sdata = mpath->sdata;
         int ret;
 
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 97269caafecd..86c8dfef56a4 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -399,8 +399,7 @@ struct mesh_path *mesh_path_new(struct ieee80211_sub_if_data *sdata,
         skb_queue_head_init(&new_mpath->frame_queue);
         new_mpath->exp_time = jiffies;
         spin_lock_init(&new_mpath->state_lock);
-        setup_timer(&new_mpath->timer, mesh_path_timer,
-                    (unsigned long) new_mpath);
+        timer_setup(&new_mpath->timer, mesh_path_timer, 0);
 
         return new_mpath;
 }
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index e4ededa1909d..04460440d731 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1066,10 +1066,10 @@ void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
 }
 EXPORT_SYMBOL(ieee80211_chswitch_done);
 
-static void ieee80211_chswitch_timer(unsigned long data)
+static void ieee80211_chswitch_timer(struct timer_list *t)
 {
         struct ieee80211_sub_if_data *sdata =
-                (struct ieee80211_sub_if_data *) data;
+                from_timer(sdata, t, u.mgd.chswitch_timer);
 
         ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
 }
@@ -1577,9 +1577,9 @@ void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
         }
 }
 
-void ieee80211_dynamic_ps_timer(unsigned long data)
+void ieee80211_dynamic_ps_timer(struct timer_list *t)
 {
-        struct ieee80211_local *local = (void *) data;
+        struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
 
         ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
 }
@@ -3711,10 +3711,10 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
         sdata_unlock(sdata);
 }
 
-static void ieee80211_sta_timer(unsigned long data)
+static void ieee80211_sta_timer(struct timer_list *t)
 {
         struct ieee80211_sub_if_data *sdata =
-                (struct ieee80211_sub_if_data *) data;
+                from_timer(sdata, t, u.mgd.timer);
 
         ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 }
@@ -3991,10 +3991,10 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
         sdata_unlock(sdata);
 }
 
-static void ieee80211_sta_bcn_mon_timer(unsigned long data)
+static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
 {
         struct ieee80211_sub_if_data *sdata =
-                (struct ieee80211_sub_if_data *) data;
+                from_timer(sdata, t, u.mgd.bcn_mon_timer);
         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
         if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
@@ -4005,10 +4005,10 @@ static void ieee80211_sta_bcn_mon_timer(unsigned long data)
                              &sdata->u.mgd.beacon_connection_loss_work);
 }
 
-static void ieee80211_sta_conn_mon_timer(unsigned long data)
+static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
 {
         struct ieee80211_sub_if_data *sdata =
-                (struct ieee80211_sub_if_data *) data;
+                from_timer(sdata, t, u.mgd.conn_mon_timer);
         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
         struct ieee80211_local *local = sdata->local;
 
@@ -4139,14 +4139,10 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
         INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
         INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
                           ieee80211_tdls_peer_del_work);
-        setup_timer(&ifmgd->timer, ieee80211_sta_timer,
-                    (unsigned long) sdata);
-        setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
-                    (unsigned long) sdata);
-        setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
-                    (unsigned long) sdata);
-        setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
-                    (unsigned long) sdata);
+        timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
+        timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
+        timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
+        timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
         INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
                           ieee80211_sta_handle_tspec_ac_params_wk);
 
diff --git a/net/mac80211/ocb.c b/net/mac80211/ocb.c
index 88e6ebbbe24f..d351dc1162be 100644
--- a/net/mac80211/ocb.c
+++ b/net/mac80211/ocb.c
@@ -150,9 +150,10 @@ void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata)
         sdata_unlock(sdata);
 }
 
-static void ieee80211_ocb_housekeeping_timer(unsigned long data)
+static void ieee80211_ocb_housekeeping_timer(struct timer_list *t)
 {
-        struct ieee80211_sub_if_data *sdata = (void *)data;
+        struct ieee80211_sub_if_data *sdata =
+                from_timer(sdata, t, u.ocb.housekeeping_timer);
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
 
@@ -165,9 +166,8 @@ void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata)
 {
         struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
 
-        setup_timer(&ifocb->housekeeping_timer,
-                    ieee80211_ocb_housekeeping_timer,
-                    (unsigned long)sdata);
+        timer_setup(&ifocb->housekeeping_timer,
+                    ieee80211_ocb_housekeeping_timer, 0);
         INIT_LIST_HEAD(&ifocb->incomplete_stations);
         spin_lock_init(&ifocb->incomplete_lock);
 }
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index a3060e55122c..0e50065e3433 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -1064,9 +1064,9 @@ int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
         return ret;
 }
 
-static void sta_info_cleanup(unsigned long data)
+static void sta_info_cleanup(struct timer_list *t)
 {
-        struct ieee80211_local *local = (struct ieee80211_local *) data;
+        struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
         struct sta_info *sta;
         bool timer_needed = false;
 
@@ -1098,8 +1098,7 @@ int sta_info_init(struct ieee80211_local *local)
         mutex_init(&local->sta_mtx);
         INIT_LIST_HEAD(&local->sta_list);
 
-        setup_timer(&local->sta_cleanup, sta_info_cleanup,
-                    (unsigned long)local);
+        timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
         return 0;
 }