wifi: mac80211: don't unreserve never reserved chanctx

[ Upstream commit a6d521bafcb290294128a51b13dbf4baae5748fc ]

If a link has no chanctx, indicating it is an inactive link
that we tracked CSA for, then attempting to unreserve the
reserved chanctx will throw a warning and fail, since there
never was a reserved chanctx. Skip the unreserve.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250709233537.022192f4b1ae.Ib58156ac13e674a9f4d714735be0764a244c0aae@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 42bb996157e9d6f49c3ef87ae4509e76945baad9..60f943f133ac21e01aaf55a67c007f875497c236 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2535,7 +2535,8 @@ ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link)
        if (!local->ops->abort_channel_switch)
                return;
 
-       ieee80211_link_unreserve_chanctx(link);
+       if (rcu_access_pointer(link->conf->chanctx_conf))
+               ieee80211_link_unreserve_chanctx(link);
 
        ieee80211_vif_unblock_queues_csa(sdata);