Commit 543708be authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville

mac80211: fix sw scan bracketing

Currently, detection in hwsim and ath9k can
detect that two sw scans are in flight at the
same time, which isn't really true. It is
caused by a race condition, because the scan
complete callback is called too late, after
the lock has been dropped, so that a new scan
can be started before it is called.

It is also called too early semantically, as
it is currently called _after_ the return to
the operating channel -- it should be before
so that drivers know this is the operating
channel again.
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 8223d2f5
......@@ -286,6 +286,8 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
local->scanning = 0;
local->scan_channel = NULL;
drv_sw_scan_complete(local);
/* we only have to protect scan_req and hw/sw scan */
mutex_unlock(&local->scan_mtx);
......@@ -295,8 +297,6 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
ieee80211_configure_filter(local);
drv_sw_scan_complete(local);
ieee80211_offchannel_return(local, true);
done:
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment