From: John W. Linville Date: Mon, 30 Aug 2010 19:12:02 +0000 (-0400) Subject: mac80211: cancel scan in ieee80211_restart_hw if software scan pending X-Git-Tag: accepted/tizen/common/20141203.182822~9836^2~265^2^2~176 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=18145c69349f2ab60c470798f83b3a2639e2a8d9;p=platform%2Fkernel%2Flinux-arm64.git mac80211: cancel scan in ieee80211_restart_hw if software scan pending This function exists to clean-up after a hardware error or something similar. The restart is accomplished using the same infrastructure used to resume after a suspend. The suspend path cancels running scans, so it seems appropriate to do that here as well for software-based scans. If a hardware-based scan is pending, issue a warning message since this indicates that the drivers has failed to clean-up after itself. Signed-off-by: John W. Linville --- diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 93194f6..a06b6ee 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -305,7 +305,13 @@ void ieee80211_restart_hw(struct ieee80211_hw *hw) trace_api_restart_hw(local); - /* use this reason, __ieee80211_resume will unblock it */ + WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), + "%s called with hardware scan in progress\n", __func__); + + if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning))) + ieee80211_scan_cancel(local); + + /* use this reason, ieee80211_reconfig will unblock it */ ieee80211_stop_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_SUSPEND);