mwifiex: fix ext_capab IE structure definition

EXT_CAPAB_IE format involves IEEE header followed by bytestream of
capabilities. Current structure has incorrect member u8 for data;
fix it by defining it as u8[0].
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/11n.c

@@ -292,6 +292,7 @@ mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 	struct mwifiex_ie_types_extcap *ext_cap;
 	int ret_len = 0;
 	struct ieee80211_supported_band *sband;
+	struct ieee_types_header *hdr;
 	u8 radio_type;
 
 	if (!buffer || !*buffer)
@@ -388,17 +389,18 @@ mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 	}
 
 	if (bss_desc->bcn_ext_cap) {
+		hdr = (void *)bss_desc->bcn_ext_cap;
 		ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
 		memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
 		ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
-		ext_cap->header.len = cpu_to_le16(sizeof(ext_cap->ext_cap));
+		ext_cap->header.len = cpu_to_le16(hdr->len);
 
-		memcpy((u8 *)ext_cap + sizeof(struct mwifiex_ie_types_header),
+		memcpy((u8 *)ext_cap->ext_capab,
 		       bss_desc->bcn_ext_cap + sizeof(struct ieee_types_header),
 		       le16_to_cpu(ext_cap->header.len));
 
-		*buffer += sizeof(struct mwifiex_ie_types_extcap);
-		ret_len += sizeof(struct mwifiex_ie_types_extcap);
+		*buffer += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
+		ret_len += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
 	}
 
 	return ret_len;

drivers/net/wireless/mwifiex/fw.h

@@ -1330,7 +1330,7 @@ struct mwifiex_ie_types_2040bssco {
 
 struct mwifiex_ie_types_extcap {
 	struct mwifiex_ie_types_header header;
-	u8 ext_cap;
+	u8 ext_capab[0];
 } __packed;
 
 struct host_cmd_ds_mac_reg_access {