diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-10-31 07:44:08 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-11-02 15:39:49 -0500 |
| commit | 6d3560d4fc9c5b9fe1a07a63926ea70512c69c32 (patch) | |
| tree | 081b2d43707eb2f55414041fd088a6a60f38e2fc | |
| parent | 1933ac4d9377ed44caba45abe1531ec1bc14bb63 (diff) | |
mac80211: fix scan abort sanity checks
Since sometimes mac80211 queues up a scan request
to only act on it later, it must be allowed to
(internally) cancel a not-yet-running scan, e.g.
when the interface is taken down. This condition
was missing since we always checked only the
local->scanning variable which isn't yet set in
that situation.
Reported-by: Luis R. Rodriguez <mcgrof@gmail.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | net/mac80211/scan.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index c46ac01e2a8..88a9a1be314 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -288,10 +288,14 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) mutex_lock(&local->scan_mtx); - if (WARN_ON(!local->scanning)) { - mutex_unlock(&local->scan_mtx); - return; - } + /* + * It's ok to abort a not-yet-running scan (that + * we have one at all will be verified by checking + * local->scan_req next), but not to complete it + * successfully. + */ + if (WARN_ON(!local->scanning && !aborted)) + aborted = true; if (WARN_ON(!local->scan_req)) { mutex_unlock(&local->scan_mtx); |