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-rw-r--r--include/net/cfg80211.h5
-rw-r--r--net/wireless/nl80211.c15
2 files changed, 18 insertions, 2 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 0d5979924be..4d5acb01363 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1468,6 +1468,9 @@ struct ieee80211_txrx_stypes {
* @mgmt_stypes: bitmasks of frame subtypes that can be subscribed to or
* transmitted through nl80211, points to an array indexed by interface
* type
+ *
+ * @available_antennas: bitmap of antennas which are available to configure.
+ * antenna configuration commands will be rejected unless this is set.
*/
struct wiphy {
/* assign these fields before you register the wiphy */
@@ -1507,6 +1510,8 @@ struct wiphy {
u8 max_num_pmkids;
+ u32 available_antennas;
+
/* If multiple wiphys are registered and you're handed e.g.
* a regular netdev with assigned ieee80211_ptr, you won't
* know whether it points to a wiphy your driver has registered
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c3f80e56536..73a7f6d354c 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -548,7 +548,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
- if (dev->ops->get_antenna) {
+ if (dev->wiphy.available_antennas && dev->ops->get_antenna) {
u32 tx_ant = 0, rx_ant = 0;
int res;
res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
@@ -1046,7 +1046,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
u32 tx_ant, rx_ant;
- if (!rdev->ops->set_antenna) {
+ if (!rdev->wiphy.available_antennas || !rdev->ops->set_antenna) {
result = -EOPNOTSUPP;
goto bad_res;
}
@@ -1054,6 +1054,17 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
+ /* reject antenna configurations which don't match the
+ * available antenna mask, except for the "all" mask */
+ if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas)) ||
+ (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas))) {
+ result = -EINVAL;
+ goto bad_res;
+ }
+
+ tx_ant = tx_ant & rdev->wiphy.available_antennas;
+ rx_ant = rx_ant & rdev->wiphy.available_antennas;
+
result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
if (result)
goto bad_res;