diff mbox series

mac80211: avoid processing non-S1G elements on S1G band

Message ID 20201001174748.24520-1-thomas@adapt-ip.com (mailing list archive)
State Accepted
Delegated to: Johannes Berg
Headers show
Series mac80211: avoid processing non-S1G elements on S1G band | expand

Commit Message

Thomas Pedersen Oct. 1, 2020, 5:47 p.m. UTC
In ieee80211_determine_chantype(), the sband->ht_cap was
being processed before S1G Operation element.  Since the
HT capability element should not be present on the S1G
band, avoid processing potential garbage by moving the
call to ieee80211_apply_htcap_overrides() to after the S1G
block.

Also, in case of a missing S1G Operation element, we would
continue trying to process non-S1G elements (and return
with a channel width of 20MHz). Instead, just assume
primary channel is equal to operating and infer the
operating width from the BSS channel, then return.

Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
---
 net/mac80211/mlme.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 38e87ac9902e..e9a8e8e94ee6 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -172,13 +172,13 @@  ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 			ret = 0;
 		vht_chandef = *chandef;
 		goto out;
-	}
-
-	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
-	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
+	} else if (sband->band == NL80211_BAND_S1GHZ) {
+		if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) {
+			sdata_info(sdata,
+				   "Missing S1G Operation Element? Trying operating == primary\n");
+			chandef->width = ieee80211_s1g_channel_width(channel);
+		}
 
-	if (s1g_oper && sband->band == NL80211_BAND_S1GHZ) {
-		ieee80211_chandef_s1g_oper(s1g_oper, chandef);
 		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ |
 		      IEEE80211_STA_DISABLE_VHT |
 		      IEEE80211_STA_DISABLE_80P80MHZ |
@@ -186,6 +186,9 @@  ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 		goto out;
 	}
 
+	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
+	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
+
 	if (!ht_oper || !sta_ht_cap.ht_supported) {
 		ret = IEEE80211_STA_DISABLE_HT |
 		      IEEE80211_STA_DISABLE_VHT |