brcmfmac: obtain ifp through wdev structure

For P2P_DEVICE interface the function brcmf_cfg80211_update_proto_addr_mode()
resulted in a crash, because it assumed wdev->netdev would be valid. The
ifp should be obtained through the driver vif structure which contains the
wireless_dev.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
index 2e134a6231c1..f3a9804988a6 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
@@ -497,8 +497,11 @@ brcmf_configure_arp_offload(struct brcmf_if *ifp, bool enable)
 static void
 brcmf_cfg80211_update_proto_addr_mode(struct wireless_dev *wdev)
 {
-        struct net_device *ndev = wdev->netdev;
-        struct brcmf_if *ifp = netdev_priv(ndev);
+        struct brcmf_cfg80211_vif *vif;
+        struct brcmf_if *ifp;
+
+        vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
+        ifp = vif->ifp;
 
         if ((wdev->iftype == NL80211_IFTYPE_ADHOC) ||
             (wdev->iftype == NL80211_IFTYPE_AP) ||