nl80211/cfg80211: add WIPHY_FLAG_AP_UAPSD flag

add WIPHY_FLAG_AP_UAPSD flag to indicate uapsd support on
AP mode.

Advertise it to userspace by including a new
NL80211_ATTR_SUPPORT_AP_UAPSD attribute.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/linux/nl80211.h

@@ -1044,6 +1044,8 @@ enum nl80211_commands {
  *
  * @NL80211_ATTR_STA_WME: Nested attribute containing the wme configuration
  *	of the station, see &enum nl80211_sta_wme_attr.
+ * @NL80211_ATTR_SUPPORT_AP_UAPSD: the device supports uapsd when working
+ *	as AP.
  *
  * @NL80211_ATTR_ROAM_SUPPORT: Indicates whether the firmware is capable of
  *	roaming to another AP in the same ESS if the signal lever is low.
@@ -1259,6 +1261,7 @@ enum nl80211_attrs {
 	NL80211_ATTR_IE_ASSOC_RESP,
 
 	NL80211_ATTR_STA_WME,
+	NL80211_ATTR_SUPPORT_AP_UAPSD,
 
 	NL80211_ATTR_ROAM_SUPPORT,
 

include/net/cfg80211.h

@@ -1621,6 +1621,7 @@ struct cfg80211_ops {
  * @WIPHY_FLAG_SUPPORTS_SCHED_SCAN: The device supports scheduled scans.
  * @WIPHY_FLAG_SUPPORTS_FW_ROAM: The device supports roaming feature in the
  *	firmware.
+ * @WIPHY_FLAG_AP_UAPSD: The device supports uapsd on AP.
  */
 enum wiphy_flags {
 	WIPHY_FLAG_CUSTOM_REGULATORY		= BIT(0),
@@ -1636,6 +1637,7 @@ enum wiphy_flags {
 	WIPHY_FLAG_SUPPORTS_SCHED_SCAN		= BIT(11),
 	WIPHY_FLAG_ENFORCE_COMBINATIONS		= BIT(12),
 	WIPHY_FLAG_SUPPORTS_FW_ROAM		= BIT(13),
+	WIPHY_FLAG_AP_UAPSD			= BIT(14),
 };
 
 /**

net/wireless/nl80211.c

@@ -720,6 +720,8 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 	if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
+	if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
+		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
 
 	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 		NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
@@ -2601,7 +2603,8 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
 		return -EINVAL;
 
 	/* parse WME attributes if sta is WME capable */
-	if ((params.sta_flags_set & NL80211_STA_FLAG_WME) &&
+	if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
+	    (params.sta_flags_set & NL80211_STA_FLAG_WME) &&
 	    info->attrs[NL80211_ATTR_STA_WME]) {
 		struct nlattr *tb[NL80211_STA_WME_MAX + 1];
 		struct nlattr *nla;