brcmfmac: make use of cfg80211_check_combinations()

Use cfg80211_check_combinations() so we can bail out early when an
interface add or change results in an invalid combination.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
index 26e1fe8..a293275 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
@@ -469,6 +469,36 @@ brcmf_find_wpsie(const u8 *parse, u32 len)
        return NULL;
 }
 
+static int brcmf_vif_change_validate(struct brcmf_cfg80211_info *cfg,
+                                    struct brcmf_cfg80211_vif *vif,
+                                    enum nl80211_iftype new_type)
+{
+       int iftype_num[NUM_NL80211_IFTYPES];
+       struct brcmf_cfg80211_vif *pos;
+
+       memset(&iftype_num[0], 0, sizeof(iftype_num));
+       list_for_each_entry(pos, &cfg->vif_list, list)
+               if (pos == vif)
+                       iftype_num[new_type]++;
+               else
+                       iftype_num[pos->wdev.iftype]++;
+
+       return cfg80211_check_combinations(cfg->wiphy, 1, 0, iftype_num);
+}
+
+static int brcmf_vif_add_validate(struct brcmf_cfg80211_info *cfg,
+                                 enum nl80211_iftype new_type)
+{
+       int iftype_num[NUM_NL80211_IFTYPES];
+       struct brcmf_cfg80211_vif *pos;
+
+       memset(&iftype_num[0], 0, sizeof(iftype_num));
+       list_for_each_entry(pos, &cfg->vif_list, list)
+               iftype_num[pos->wdev.iftype]++;
+
+       iftype_num[new_type]++;
+       return cfg80211_check_combinations(cfg->wiphy, 1, 0, iftype_num);
+}
 
 static void convert_key_from_CPU(struct brcmf_wsec_key *key,
                                 struct brcmf_wsec_key_le *key_le)
@@ -663,8 +693,14 @@ static struct wireless_dev *brcmf_cfg80211_add_iface(struct wiphy *wiphy,
                                                     struct vif_params *params)
 {
        struct wireless_dev *wdev;
+       int err;
 
        brcmf_dbg(TRACE, "enter: %s type %d\n", name, type);
+       err = brcmf_vif_add_validate(wiphy_to_cfg(wiphy), type);
+       if (err) {
+               brcmf_err("iface validation failed: err=%d\n", err);
+               return ERR_PTR(err);
+       }
        switch (type) {
        case NL80211_IFTYPE_ADHOC:
        case NL80211_IFTYPE_STATION:
@@ -823,8 +859,12 @@ brcmf_cfg80211_change_iface(struct wiphy *wiphy, struct net_device *ndev,
        s32 ap = 0;
        s32 err = 0;
 
-       brcmf_dbg(TRACE, "Enter, ndev=%p, type=%d\n", ndev, type);
-
+       brcmf_dbg(TRACE, "Enter, idx=%d, type=%d\n", ifp->bssidx, type);
+       err = brcmf_vif_change_validate(wiphy_to_cfg(wiphy), vif, type);
+       if (err) {
+               brcmf_err("iface validation failed: err=%d\n", err);
+               return err;
+       }
        switch (type) {
        case NL80211_IFTYPE_MONITOR:
        case NL80211_IFTYPE_WDS: