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mac80211: disable beacons before removing the associated interface

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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>
This commit is contained in:
Bob Copeland
2009-07-29 10:13:03 +02:00
committed by John W. Linville
parent ad2f34b41f
commit 97af743207
3 changed files with 16 additions and 1 deletions
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4
net/mac80211/pm.c
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@ -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;