From: Hari Chandrakanthan <quic_haric@xxxxxxxxxxx> When AP reduces its channel bandwidth from 80 MHz to 40 MHz, the associated station reduces the channel bandwidth from 80 MHz to 20 MHz. In the above case, the associated sta is expected to reduce the channel bandwidth to 40 MHz. The API ieee80211_parse_ch_switch_ie which parses CSA element, checks for 80 MHz and 160 MHz if wide band channel switch element and does not consider 40 MHz.
