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If an interface is set down or, per the previous patch, changes type, radar detection for it should be cancelled. This is done for AP mode in mac80211 (somewhat needlessly, since cfg80211 can do it, but didn't until now), but wasn't handled for mesh, so if radar detection was started and then the interface set down or its type switched (the latter sometimes happning in the hwsim test 'mesh_peer_connected_dfs'), radar detection would be around with the interface unknown to the driver, later leading to some warnings around chanctx usage. Link: https://patch.msgid.link/20251121174021.290120e419e3.I2a5650c9062e29c988992dd8ce0d8eb570d23267@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>