[PATCH 02/14] wifi: cfg80211: disallow SMPS in AP mode

[Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>]

From: Johannes Berg <johannes.berg@xxxxxxxxx>

In practice, userspace hasn't been able to set this for many
years, and mac80211 has already rejected it (which is now no
longer needed), so reject SMPS mode (other than "OFF" to be
a bit more compatible) in AP mode. Also remove the parameter
from the AP settings struct.

Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
---
 .../net/wireless/quantenna/qtnfmac/commands.c |  2 +-
 include/net/cfg80211.h                        |  2 --
 net/mac80211/cfg.c                            |  3 --
 net/wireless/nl80211.c                        | 30 ++-----------------
 4 files changed, 4 insertions(+), 33 deletions(-)

diff --git a/drivers/net/wireless/quantenna/qtnfmac/commands.c b/drivers/net/wireless/quantenna/qtnfmac/commands.c
index 9540ad6196d7..956c5763662f 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/commands.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/commands.c
@@ -257,7 +257,7 @@ int qtnf_cmd_send_start_ap(struct qtnf_vif *vif,
 	cmd->beacon_interval = cpu_to_le16(s->beacon_interval);
 	cmd->hidden_ssid = qlink_hidden_ssid_nl2q(s->hidden_ssid);
 	cmd->inactivity_timeout = cpu_to_le16(s->inactivity_timeout);
-	cmd->smps_mode = s->smps_mode;
+	cmd->smps_mode = NL80211_SMPS_OFF;
 	cmd->p2p_ctwindow = s->p2p_ctwindow;
 	cmd->p2p_opp_ps = s->p2p_opp_ps;
 	cmd->pbss = s->pbss;
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 69ec1eb41a09..c8ce5c2e14f4 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1460,7 +1460,6 @@ struct cfg80211_unsol_bcast_probe_resp {
  * @crypto: crypto settings
  * @privacy: the BSS uses privacy
  * @auth_type: Authentication type (algorithm)
- * @smps_mode: SMPS mode
  * @inactivity_timeout: time in seconds to determine station's inactivity.
  * @p2p_ctwindow: P2P CT Window
  * @p2p_opp_ps: P2P opportunistic PS
@@ -1498,7 +1497,6 @@ struct cfg80211_ap_settings {
 	struct cfg80211_crypto_settings crypto;
 	bool privacy;
 	enum nl80211_auth_type auth_type;
-	enum nl80211_smps_mode smps_mode;
 	int inactivity_timeout;
 	u8 p2p_ctwindow;
 	bool p2p_opp_ps;
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index ce9558cd1576..548b9bbdac04 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1312,9 +1312,6 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 	if (old)
 		return -EALREADY;
 
-	if (params->smps_mode != NL80211_SMPS_OFF)
-		return -EOPNOTSUPP;
-
 	link->smps_mode = IEEE80211_SMPS_OFF;
 
 	link->needed_rx_chains = sdata->local->rx_chains;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 9ab777e0bd4d..3a434f4654ab 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6227,33 +6227,9 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
 			goto out;
 	}
 
-	if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
-		params->smps_mode =
-			nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
-		switch (params->smps_mode) {
-		case NL80211_SMPS_OFF:
-			break;
-		case NL80211_SMPS_STATIC:
-			if (!(rdev->wiphy.features &
-			      NL80211_FEATURE_STATIC_SMPS)) {
-				err = -EINVAL;
-				goto out;
-			}
-			break;
-		case NL80211_SMPS_DYNAMIC:
-			if (!(rdev->wiphy.features &
-			      NL80211_FEATURE_DYNAMIC_SMPS)) {
-				err = -EINVAL;
-				goto out;
-			}
-			break;
-		default:
-			err = -EINVAL;
-			goto out;
-		}
-	} else {
-		params->smps_mode = NL80211_SMPS_OFF;
-	}
+	if (info->attrs[NL80211_ATTR_SMPS_MODE] &&
+	    nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]) != NL80211_SMPS_OFF)
+		return -EOPNOTSUPP;
 
 	params->pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
 	if (params->pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
-- 
2.34.1