brcmf_cfg80211_change_iface(struct wiphy *wiphy, struct net_device *ndev,
			 enum nl80211_iftype type,
			 struct vif_params *params)
{
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_cfg80211_vif *vif = ifp->vif;
	s32 infra = 0;
	s32 ap = 0;
	s32 err = 0;

	brcmf_dbg(TRACE, "Enter, bsscfgidx=%d, type=%d\n", ifp->bsscfgidx,
		  type);

	/* WAR: There are a number of p2p interface related problems which
	 * need to be handled initially (before doing the validate).
	 * wpa_supplicant tends to do iface changes on p2p device/client/go
	 * which are not always possible/allowed. However we need to return
	 * OK otherwise the wpa_supplicant wont start. The situation differs
	 * on configuration and setup (p2pon=1 module param). The first check
	 * is to see if the request is a change to station for p2p iface.
	 */
	if ((type == NL80211_IFTYPE_STATION) &&
	    ((vif->wdev.iftype == NL80211_IFTYPE_P2P_CLIENT) ||
	     (vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) ||
	     (vif->wdev.iftype == NL80211_IFTYPE_P2P_DEVICE))) {
		brcmf_dbg(TRACE, "Ignoring cmd for p2p if\n");
		/* Now depending on whether module param p2pon=1 was used the
		 * response needs to be either 0 or EOPNOTSUPP. The reason is
		 * that if p2pon=1 is used, but a newer supplicant is used then
		 * we should return an error, as this combination wont work.
		 * In other situations 0 is returned and supplicant will start
		 * normally. It will give a trace in cfg80211, but it is the
		 * only way to get it working. Unfortunately this will result
		 * in situation where we wont support new supplicant in
		 * combination with module param p2pon=1, but that is the way
		 * it is. If the user tries this then unloading of driver might
		 * fail/lock.
		 */
		if (cfg->p2p.p2pdev_dynamically)
			return -EOPNOTSUPP;
		else
			return 0;
	}
	err = brcmf_vif_change_validate(wiphy_to_cfg(wiphy), vif, type);
	if (err) {
		bphy_err(wiphy, "iface validation failed: err=%d\n", err);
		return err;
	}
	switch (type) {
	case NL80211_IFTYPE_MONITOR:
	case NL80211_IFTYPE_WDS:
		bphy_err(wiphy, "type (%d) : currently we do not support this type\n",
			 type);
		return -EOPNOTSUPP;
	case NL80211_IFTYPE_ADHOC:
		infra = 0;
		break;
	case NL80211_IFTYPE_STATION:
		infra = 1;
		break;
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_P2P_GO:
		ap = 1;
		break;
	default:
		err = -EINVAL;
		goto done;
	}

	if (ap) {
		if (type == NL80211_IFTYPE_P2P_GO) {
			brcmf_dbg(INFO, "IF Type = P2P GO\n");
			err = brcmf_p2p_ifchange(cfg, BRCMF_FIL_P2P_IF_GO);
		}
		if (!err) {
			brcmf_dbg(INFO, "IF Type = AP\n");
		}
	} else {
		err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_INFRA, infra);
		if (err) {
			bphy_err(wiphy, "WLC_SET_INFRA error (%d)\n", err);
			err = -EAGAIN;
			goto done;
		}
		brcmf_dbg(INFO, "IF Type = %s\n", brcmf_is_ibssmode(vif) ?
			  "Adhoc" : "Infra");
	}
	ndev->ieee80211_ptr->iftype = type;

	brcmf_cfg80211_update_proto_addr_mode(&vif->wdev);

done:
	brcmf_dbg(TRACE, "Exit\n");

	return err;
}
Unknown