Hi, brcmfmac in general is not capable of removing interfaces. If you take a look at brcmf_cfg80211_del_iface implementation, you'll see it returns -EOPNOTSUPP (except for p2p interfaces). However there is problem in handling NL80211_CMD_STOP_AP (with the brcmf_cfg80211_stop_ap callback). Current implementation calls brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1) if mbss support is enabled/used. Above call results in firmware generating BRCMF_E_LINK event. This event is handled with the following forward-traced functions chain: 1) brcmf_notify_connect_status 2) brcmf_notify_connect_status_ap 3) brcmf_remove_interface 4) brcmf_del_if 5) brcmf_net_detach 6) unregister_netdev So the result of NL80211_CMD_STOP_AP is interface being removed. The problem with this behavior is that interface can't be recreated after that: # iw phy phy1 interface add wlan1-1 type __ap [ 3602.929199] brcmfmac: brcmf_ap_add_vif: timeout occurred command failed: I/O error (-5) I hit this problem when trying to restart hostapd using BCM43602 and 2 BSSes. Could you analyze this problem and see if you see some way of solving this problem, please? -- Rafał -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
