wl1271: fixed problem with WPS IEs in probe requests

Inclusion of a WPS IE in probe requests caused a problem
in the driver due to the maximum size of the probe request
template and the max_scan_ie_len values at initialization.

Increased the size of probe request template
to the maximum size allowed by the firmware.
Struct wl12xx_probe_req_template, which was only used
for calculating the max size of the probe request template,
is no longer used and needed.

max_scan_ie_len is used for validating the size of
additional IEs in scan requests.
Initialized the max_scan_ie_len field to the maximum size
of the probe request template minus the ieee80211 header size.

Signed-off-by: Guy Eilam <guy@wizery.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>

drivers/net/wireless/wl12xx/init.c

@@ -53,18 +53,16 @@ static int wl1271_init_hwenc_config(struct wl1271 *wl)
 int wl1271_init_templates_config(struct wl1271 *wl)
 {
 	int ret, i;
-	size_t size;
 
 	/* send empty templates for fw memory reservation */
 	ret = wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4, NULL,
-				      sizeof(struct wl12xx_probe_req_template),
+				      WL1271_CMD_TEMPL_MAX_SIZE,
 				      0, WL1271_RATE_AUTOMATIC);
 	if (ret < 0)
 		return ret;
 
-	size = sizeof(struct wl12xx_probe_req_template);
 	ret = wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_5,
-				      NULL, size, 0,
+				      NULL, WL1271_CMD_TEMPL_MAX_SIZE, 0,
 				      WL1271_RATE_AUTOMATIC);
 	if (ret < 0)
 		return ret;

drivers/net/wireless/wl12xx/main.c

@@ -2666,6 +2666,13 @@ int wl1271_init_ieee80211(struct wl1271 *wl)
 	wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 		BIT(NL80211_IFTYPE_ADHOC);
 	wl->hw->wiphy->max_scan_ssids = 1;
+	/*
+	 * Maximum length of elements in scanning probe request templates
+	 * should be the maximum length possible for a template, without
+	 * the IEEE80211 header of the template
+	 */
+	wl->hw->wiphy->max_scan_ie_len = WL1271_CMD_TEMPL_MAX_SIZE -
+			sizeof(struct ieee80211_header);
 	wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
 	wl->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &wl1271_band_5ghz;
 

drivers/net/wireless/wl12xx/wl12xx_80211.h

@@ -134,13 +134,6 @@ struct wl12xx_qos_null_data_template {
 	__le16 qos_ctl;
 } __packed;
 
-struct wl12xx_probe_req_template {
-	struct ieee80211_header header;
-	struct wl12xx_ie_ssid ssid;
-	struct wl12xx_ie_rates rates;
-	struct wl12xx_ie_rates ext_rates;
-} __packed;
-
 struct wl12xx_arp_rsp_template {
 	struct ieee80211_hdr_3addr hdr;