From 8414ff07ac8802e282683812514ef5b0ea133cb8 Mon Sep 17 00:00:00 2001 From: Helmut Schaa Date: Sun, 30 Jan 2011 13:16:28 +0100 Subject: [PATCH] rt2x00: Introduce beacon_update_locked that requires caller locking Introduce a beacon_update_locked function that does not acquire the according beacon mutex to allow beacon updates from atomic context. The caller has to take care of synchronization. No functional changes. Just preparation for beacon updates from tasklet context. Signed-off-by: Helmut Schaa Acked-by: Gertjan van Wingerde Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2x00lib.h | 12 +++++++++++- drivers/net/wireless/rt2x00/rt2x00queue.c | 24 +++++++++++++++-------- 2 files changed, 27 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h index 6c6a8f15870e..2d94cbaf5f4a 100644 --- a/drivers/net/wireless/rt2x00/rt2x00lib.h +++ b/drivers/net/wireless/rt2x00/rt2x00lib.h @@ -157,13 +157,23 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, bool local); /** - * rt2x00queue_update_beacon - Send new beacon from mac80211 to hardware + * rt2x00queue_update_beacon - Send new beacon from mac80211 + * to hardware. Handles locking by itself (mutex). * @rt2x00dev: Pointer to &struct rt2x00_dev. * @vif: Interface for which the beacon should be updated. */ int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, struct ieee80211_vif *vif); +/** + * rt2x00queue_update_beacon_locked - Send new beacon from mac80211 + * to hardware. Caller needs to ensure locking. + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * @vif: Interface for which the beacon should be updated. + */ +int rt2x00queue_update_beacon_locked(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif); + /** * rt2x00queue_clear_beacon - Clear beacon in hardware * @rt2x00dev: Pointer to &struct rt2x00_dev. diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 24bcdb47a465..7d7fbe0315af 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -593,8 +593,8 @@ int rt2x00queue_clear_beacon(struct rt2x00_dev *rt2x00dev, return 0; } -int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, - struct ieee80211_vif *vif) +int rt2x00queue_update_beacon_locked(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif) { struct rt2x00_intf *intf = vif_to_intf(vif); struct skb_frame_desc *skbdesc; @@ -603,18 +603,14 @@ int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, if (unlikely(!intf->beacon)) return -ENOBUFS; - mutex_lock(&intf->beacon_skb_mutex); - /* * Clean up the beacon skb. */ rt2x00queue_free_skb(intf->beacon); intf->beacon->skb = ieee80211_beacon_get(rt2x00dev->hw, vif); - if (!intf->beacon->skb) { - mutex_unlock(&intf->beacon_skb_mutex); + if (!intf->beacon->skb) return -ENOMEM; - } /* * Copy all TX descriptor information into txdesc, @@ -635,9 +631,21 @@ int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, */ rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc); + return 0; + +} + +int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif) +{ + struct rt2x00_intf *intf = vif_to_intf(vif); + int ret; + + mutex_lock(&intf->beacon_skb_mutex); + ret = rt2x00queue_update_beacon_locked(rt2x00dev, vif); mutex_unlock(&intf->beacon_skb_mutex); - return 0; + return ret; } void rt2x00queue_for_each_entry(struct data_queue *queue, -- 2.20.1