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[17/24] cfg80211: treat 6 GHz channels as valid regardless of capability

Message ID 20200528165011.f51a626ad410.I82f09b2b14a56413ce20376d09967fe954a033eb@changeid (mailing list archive)
State Superseded
Delegated to: Johannes Berg
Headers show
Series [01/24] nl80211: really allow client-only BIGTK support | expand

Commit Message

Johannes Berg May 28, 2020, 2:50 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

If a 6 GHz channel exists, then we can probably safely assume that
the device actually supports it, and then it should support most
bandwidths.

This will probably need to be extended to check the interface type
and then dig into the HE capabilities for that though, to have the
correct bandwidth check.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/chan.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)
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Patch

diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index e111c08daa0e..cddf92c5d09e 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -6,7 +6,7 @@ 
  *
  * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2013-2014  Intel Mobile Communications GmbH
- * Copyright 2018       Intel Corporation
+ * Copyright 2018-2020	Intel Corporation
  */
 
 #include <linux/export.h>
@@ -919,7 +919,8 @@  bool cfg80211_chandef_usable(struct wiphy *wiphy,
 		width = 10;
 		break;
 	case NL80211_CHAN_WIDTH_20:
-		if (!ht_cap->ht_supported)
+		if (!ht_cap->ht_supported &&
+		    chandef->chan->band != NL80211_BAND_6GHZ)
 			return false;
 		/* fall through */
 	case NL80211_CHAN_WIDTH_20_NOHT:
@@ -928,6 +929,8 @@  bool cfg80211_chandef_usable(struct wiphy *wiphy,
 		break;
 	case NL80211_CHAN_WIDTH_40:
 		width = 40;
+		if (chandef->chan->band == NL80211_BAND_6GHZ)
+			break;
 		if (!ht_cap->ht_supported)
 			return false;
 		if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
@@ -942,24 +945,29 @@  bool cfg80211_chandef_usable(struct wiphy *wiphy,
 		break;
 	case NL80211_CHAN_WIDTH_80P80:
 		cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
-		if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
+		if (chandef->chan->band != NL80211_BAND_6GHZ &&
+		    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 			return false;
 		/* fall through */
 	case NL80211_CHAN_WIDTH_80:
-		if (!vht_cap->vht_supported)
-			return false;
 		prohibited_flags |= IEEE80211_CHAN_NO_80MHZ;
 		width = 80;
+		if (chandef->chan->band == NL80211_BAND_6GHZ)
+			break;
+		if (!vht_cap->vht_supported)
+			return false;
 		break;
 	case NL80211_CHAN_WIDTH_160:
+		prohibited_flags |= IEEE80211_CHAN_NO_160MHZ;
+		width = 160;
+		if (chandef->chan->band == NL80211_BAND_6GHZ)
+			break;
 		if (!vht_cap->vht_supported)
 			return false;
 		cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 		if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
 		    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 			return false;
-		prohibited_flags |= IEEE80211_CHAN_NO_160MHZ;
-		width = 160;
 		break;
 	default:
 		WARN_ON_ONCE(1);