[PATCH v2 2/2] wifi: cfg80211: fix regulatory disconnect with OCB/NAN

[Johannes Berg <johannes@sipsolutions.net>]

From: Johannes Berg <johannes.berg@intel.com>

Since regulatory disconnect was added, OCB and NAN interface
types were added, which made it completely unusable for any
driver that allowed OCB/NAN. Add OCB/NAN (though NAN doesn't
do anything, we don't have any info) and also remove all the
logic that opts out, so it won't be broken again if/when new
interface types are added.

Fixes: 6e0bd6c35b02 ("cfg80211: 802.11p OCB mode handling")
Fixes: cb3b7d87652a ("cfg80211: add start / stop NAN commands")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
v2: add fixes tags
---
 include/net/regulatory.h | 13 +------------
 net/wireless/core.c      | 16 ----------------
 net/wireless/reg.c       | 14 ++++++++++----
 3 files changed, 11 insertions(+), 32 deletions(-)

diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index 896191f420d5..b2cb4a9eb04d 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -140,17 +140,6 @@ struct regulatory_request {
  *      otherwise initiating radiation is not allowed. This will enable the
  *      relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration
  *      option
- * @REGULATORY_IGNORE_STALE_KICKOFF: the regulatory core will _not_ make sure
- *	all interfaces on this wiphy reside on allowed channels. If this flag
- *	is not set, upon a regdomain change, the interfaces are given a grace
- *	period (currently 60 seconds) to disconnect or move to an allowed
- *	channel. Interfaces on forbidden channels are forcibly disconnected.
- *	Currently these types of interfaces are supported for enforcement:
- *	NL80211_IFTYPE_ADHOC, NL80211_IFTYPE_STATION, NL80211_IFTYPE_AP,
- *	NL80211_IFTYPE_AP_VLAN, NL80211_IFTYPE_MONITOR,
- *	NL80211_IFTYPE_P2P_CLIENT, NL80211_IFTYPE_P2P_GO,
- *	NL80211_IFTYPE_P2P_DEVICE. The flag will be set by default if a device
- *	includes any modes unsupported for enforcement checking.
  * @REGULATORY_WIPHY_SELF_MANAGED: for devices that employ wiphy-specific
  *	regdom management. These devices will ignore all regdom changes not
  *	originating from their own wiphy.
@@ -177,7 +166,7 @@ enum ieee80211_regulatory_flags {
 	REGULATORY_COUNTRY_IE_FOLLOW_POWER	= BIT(3),
 	REGULATORY_COUNTRY_IE_IGNORE		= BIT(4),
 	REGULATORY_ENABLE_RELAX_NO_IR           = BIT(5),
-	REGULATORY_IGNORE_STALE_KICKOFF         = BIT(6),
+	/* reuse bit 6 next time */
 	REGULATORY_WIPHY_SELF_MANAGED		= BIT(7),
 };
 
diff --git a/net/wireless/core.c b/net/wireless/core.c
index b3ec9eaec36b..609b79fe4a74 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -721,22 +721,6 @@ int wiphy_register(struct wiphy *wiphy)
 			return -EINVAL;
 	}
 
-	/*
-	 * if a wiphy has unsupported modes for regulatory channel enforcement,
-	 * opt-out of enforcement checking
-	 */
-	if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
-				       BIT(NL80211_IFTYPE_P2P_CLIENT) |
-				       BIT(NL80211_IFTYPE_AP) |
-				       BIT(NL80211_IFTYPE_MESH_POINT) |
-				       BIT(NL80211_IFTYPE_P2P_GO) |
-				       BIT(NL80211_IFTYPE_ADHOC) |
-				       BIT(NL80211_IFTYPE_P2P_DEVICE) |
-				       BIT(NL80211_IFTYPE_NAN) |
-				       BIT(NL80211_IFTYPE_AP_VLAN) |
-				       BIT(NL80211_IFTYPE_MONITOR)))
-		wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
-
 	if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
 		    (wiphy->regulatory_flags &
 					(REGULATORY_CUSTOM_REG |
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index f5ea1f373ab7..f9e03850d71b 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2391,9 +2391,17 @@ static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
 		case NL80211_IFTYPE_P2P_DEVICE:
 			/* no enforcement required */
 			break;
+		case NL80211_IFTYPE_OCB:
+			if (!wdev->u.ocb.chandef.chan)
+				continue;
+			chandef = wdev->u.ocb.chandef;
+			break;
+		case NL80211_IFTYPE_NAN:
+			/* we have no info, but NAN is also pretty universal */
+			continue;
 		default:
 			/* others not implemented for now */
-			WARN_ON(1);
+			WARN_ON_ONCE(1);
 			break;
 		}
 
@@ -2452,9 +2460,7 @@ static void reg_check_chans_work(struct work_struct *work)
 	rtnl_lock();
 
 	list_for_each_entry(rdev, &cfg80211_rdev_list, list)
-		if (!(rdev->wiphy.regulatory_flags &
-		      REGULATORY_IGNORE_STALE_KICKOFF))
-			reg_leave_invalid_chans(&rdev->wiphy);
+		reg_leave_invalid_chans(&rdev->wiphy);
 
 	rtnl_unlock();
 }
-- 
2.40.1