[PATCH 3.18 077/145] mac80211: flush delayed work when entering suspend

Greg Kroah-Hartman
2017-04-16T10:55:52Z

From: Matt Chen <matt.chen@intel.com>

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@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/mac80211/pm.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -116,6 +116,7 @@ int __ieee80211_suspend(struct ieee80211
break;
}

+ flush_delayed_work(&sdata->dec_tailroom_needed_wk);
drv_remove_interface(local, sdata);
}