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mac80211: assure we also cancel deferred scan request

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This is partial revert and fix for commit
85f72bc839 "mac80211: only cancel
software-based scans on suspend"

When cfg80211 request the scan and mac80211 perform some management work,
we defer the scan request. We do not canceling such requests when calling
ieee80211_scan_cancel(), because of SCAN_SW_SCANNING bit check just
before the call. So fix that problem.

Another problem, which commit 85f72bc839
tries to solve, is we can not cancel HW scan. Hence patch make
ieee80211_scan_cancel() ignore HW scan (see code comments). Keeping
local->mtx lock assures that the deferred scan will not become
"working" HW scan.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka
2010-10-06 11:22:10 +02:00
committed by John W. Linville
parent e229f844d7
commit 4136c4224c
3 changed files with 27 additions and 14 deletions
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3
net/mac80211/pm.c
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@@ -12,8 +12,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw)
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)))
ieee80211_scan_cancel(local);
ieee80211_scan_cancel(local);
ieee80211_stop_queues_by_reason(hw,
IEEE80211_QUEUE_STOP_REASON_SUSPEND);