This is a note to let you know that I've just added the patch titled mac80211: flush delayed work when entering suspend to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mac80211-flush-delayed-work-when-entering-suspend.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From a9e9200d8661c1a0be8c39f93deb383dc940de35 Mon Sep 17 00:00:00 2001 From: Matt Chen <matt.chen@xxxxxxxxx> Date: Sun, 22 Jan 2017 02:16:58 +0800 Subject: mac80211: flush delayed work when entering suspend From: Matt Chen <matt.chen@xxxxxxxxx> commit a9e9200d8661c1a0be8c39f93deb383dc940de35 upstream. The issue was found when entering suspend and resume. It triggers a warning in: mac80211/key.c: ieee80211_enable_keys() ... WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt || sdata->crypto_tx_tailroom_pending_dec); ... It points out sdata->crypto_tx_tailroom_pending_dec isn't cleaned up successfully in a delayed_work during suspend. Add a flush_delayed_work to fix it. Signed-off-by: Matt Chen <matt.chen@xxxxxxxxx> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/mac80211/pm.c | 1 + 1 file changed, 1 insertion(+) --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -168,6 +168,7 @@ int __ieee80211_suspend(struct ieee80211 break; } + flush_delayed_work(&sdata->dec_tailroom_needed_wk); drv_remove_interface(local, sdata); } Patches currently in stable-queue which might be from matt.chen@xxxxxxxxx are queue-4.4/mac80211-flush-delayed-work-when-entering-suspend.patch