From: Eliad Peller Date: Thu, 5 Dec 2013 09:21:28 +0000 (+0200) Subject: mac80211: start_next_roc only if scan was actually running X-Git-Tag: upstream/snapshot3+hdmi~3572^2~3^2^2~206 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a2b70e833e189a4aefb2d3b668e3d7046dcc45c2;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git mac80211: start_next_roc only if scan was actually running On scan completion we try start any pending roc. However, if scan was just pending (and not actually started) there is no point in trying to start the roc, as it might have started already. This solves the following warning: WARNING: CPU: 0 PID: 3552 at net/mac80211/offchannel.c:269 ieee80211_start_next_roc+0x164/0x204 [mac80211]() [] (unwind_backtrace+0x0/0xf0) [] (show_stack+0x10/0x14) [] (dump_stack+0x78/0x94) [] (warn_slowpath_common+0x68/0x8c) [] (warn_slowpath_null+0x1c/0x24) [] (ieee80211_start_next_roc+0x164/0x204 [mac80211]) [] (ieee80211_scan_cancel+0xe8/0x190 [mac80211]) [] (ieee80211_do_stop+0x63c/0x79c [mac80211]) [] (ieee80211_stop+0x10/0x18 [mac80211]) [] (__dev_close_many+0x84/0xcc) [] (__dev_close+0x28/0x3c) [] (__dev_change_flags+0x78/0x144) [] (dev_change_flags+0x10/0x48) [] (devinet_ioctl+0x614/0x6d0) [] (sock_ioctl+0x5c/0x2a4) [] (do_vfs_ioctl+0x7c/0x5d8) [] (SyS_ioctl+0x6c/0x7c) Signed-off-by: Eliad Peller Signed-off-by: Johannes Berg --- diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 78e968a..3ccb584 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -275,6 +275,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) { struct ieee80211_local *local = hw_to_local(hw); bool hw_scan = local->ops->hw_scan; + bool was_scanning = local->scanning; lockdep_assert_held(&local->mtx); @@ -327,7 +328,8 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) ieee80211_mlme_notify_scan_completed(local); ieee80211_ibss_notify_scan_completed(local); ieee80211_mesh_notify_scan_completed(local); - ieee80211_start_next_roc(local); + if (was_scanning) + ieee80211_start_next_roc(local); } void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)