diff options
| author | Bob Copeland <me@bobcopeland.com> | 2009-07-29 10:13:03 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-08-04 16:43:23 -0400 |
| commit | 97af743207466ff8b477e14bfb7af0ba2c93375b (patch) | |
| tree | 9fc275981b34346284c1aedd370c54854f5369ae | |
| parent | ad2f34b41fd6e2b84c896ccf321d5de0a7c7cd52 (diff) | |
| download | linux-97af743207466ff8b477e14bfb7af0ba2c93375b.tar.bz2 | |
mac80211: disable beacons before removing the associated interface
When downing interfaces, it's a good idea to tell the driver to
stop sending beacons; that way the driver doesn't need special
code in ops->remove_interface() when it should already handle the
case in bss_info_changed().
This fixes a potential crash with at least ath5k since the vif
pointer will be nullified while beacon interrupts are still active.
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | net/mac80211/iface.c | 10 | ||||
| -rw-r--r-- | net/mac80211/main.c | 3 | ||||
| -rw-r--r-- | net/mac80211/pm.c | 4 |
3 files changed, 16 insertions, 1 deletions
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 6c655b6547fb..6614d4ff273d 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -522,6 +522,16 @@ static int ieee80211_stop(struct net_device *dev) ieee80211_scan_completed(&local->hw, true); } + /* + * Disable beaconing for AP and mesh, IBSS can't + * still be joined to a network at this point. + */ + if (sdata->vif.type == NL80211_IFTYPE_AP || + sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { + ieee80211_bss_info_change_notify(sdata, + BSS_CHANGED_BEACON_ENABLED); + } + conf.vif = &sdata->vif; conf.type = sdata->vif.type; conf.mac_addr = dev->dev_addr; diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 9dd8d25611e0..5e76dd1daf71 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -198,7 +198,8 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, } if (changed & BSS_CHANGED_BEACON_ENABLED) { - if (test_bit(SCAN_SW_SCANNING, &local->scanning)) { + if (local->quiescing || !netif_running(sdata->dev) || + test_bit(SCAN_SW_SCANNING, &local->scanning)) { sdata->vif.bss_conf.enable_beacon = false; } else { /* diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index 5e3d476972f9..3320f7daaf25 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -96,6 +96,10 @@ int __ieee80211_suspend(struct ieee80211_hw *hw) if (!netif_running(sdata->dev)) continue; + /* disable beaconing */ + ieee80211_bss_info_change_notify(sdata, + BSS_CHANGED_BEACON_ENABLED); + conf.vif = &sdata->vif; conf.type = sdata->vif.type; conf.mac_addr = sdata->dev->dev_addr; |