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9302e63d1a
When wifi is turned off, drv_mac80211_teardown sometimes fails (silently) because the device to be torn down is not defined. This situation arises if drv_mac80211_setup was called twice when wifi was turned on. This commit ensures that the device to be torn down is always defined in drv_mac80211_teardown. Steps to reproduce: 1) Use /sbin/wifi to turn on wifi. uci set wireless.@wifi-iface[0].disabled=0 uci set wireless.@wifi-device[0].disabled=0 uci commit wifi 2) Use /sbin/wifi to turn off wifi. uci set wireless.@wifi-device[0].disabled=1 uci commit wifi 3) Observe that wifi is still up. branches affected: trunk, 21.02 Signed-off-by: Bob Cantor <coxede6557@w3boats.com> (cherry-picked from commit d515f6b6cde357bf480d32a7387f07ea40e85e52)