[PATCH 5.15 203/206] wifi: cfg80211: fix wiphy delayed work queueing

Greg Kroah-Hartman
2026-02-04T15:03:14Z

From: Johannes Berg <johannes.berg@intel.com>

commit b743287d7a0007493f5cada34ed2085d475050b4 upstream.

When a wiphy work is queued with timer, and then again
without a delay, it's started immediately but *also*
started again after the timer expires. This can lead,
for example, to warnings in mac80211's offchannel code
as reported by Jouni. Running the same work twice isn't
expected, of course. Fix this by deleting the timer at
this point, when queuing immediately due to delay=0.

Cc: stable@vger.kernel.org
Reported-by: Jouni Malinen <j@w1.fi>
Fixes: a3ee4dc84c4e ("wifi: cfg80211: add a work abstraction with special semantics")
Link: https://msgid.link/20240125095108.2feb0eaaa446.I4617f3210ed0e7f252290d5970dac6a876aa595b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/wireless/core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -5,7 +5,7 @@
* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright 2015-2017 Intel Deutschland GmbH
- * Copyright (C) 2018-2022 Intel Corporation
+ * Copyright (C) 2018-2024 Intel Corporation
*/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -1624,6 +1624,7 @@ void wiphy_delayed_work_queue(struct wip
unsigned long delay)
{
if (!delay) {
+ del_timer(&dwork->timer);
wiphy_work_queue(wiphy, &dwork->work);
return;
}