mac80211: fix decap offload for stations on AP_VLAN interfaces

Signed-off-by: Felix Fietkau <[email protected]>

package/kernel/mac80211/patches/subsys/343-wifi-mac80211-fix-decap-offload-for-stations-on-AP_V.patch

@@ -0,0 +1,37 @@
+From: Felix Fietkau <[email protected]>
+Date: Wed, 28 Sep 2022 13:50:34 +0200
+Subject: [PATCH] wifi: mac80211: fix decap offload for stations on AP_VLAN
+ interfaces
+
+Since AP_VLAN interfaces are not passed to the driver, check offload_flags
+on the bss vif instead.
+
+Reported-by: Howard Hsu <[email protected]>
+Fixes: 80a915ec4427 ("mac80211: add rx decapsulation offload support")
+Signed-off-by: Felix Fietkau <[email protected]>
+---
+
+--- a/net/mac80211/rx.c
++++ b/net/mac80211/rx.c
+@@ -4265,6 +4265,7 @@ void ieee80211_check_fast_rx(struct sta_
+ 		.vif_type = sdata->vif.type,
+ 		.control_port_protocol = sdata->control_port_protocol,
+ 	}, *old, *new = NULL;
++	u32 offload_flags;
+ 	bool set_offload = false;
+ 	bool assign = false;
+ 	bool offload;
+@@ -4380,10 +4381,10 @@ void ieee80211_check_fast_rx(struct sta_
+ 	if (assign)
+ 		new = kmemdup(&fastrx, sizeof(fastrx), GFP_KERNEL);
+ 
+-	offload = assign &&
+-		  (sdata->vif.offload_flags & IEEE80211_OFFLOAD_DECAP_ENABLED);
++	offload_flags = get_bss_sdata(sdata)->vif.offload_flags;
++	offload = offload_flags & IEEE80211_OFFLOAD_DECAP_ENABLED;
+ 
+-	if (offload)
++	if (assign && offload)
+ 		set_offload = !test_and_set_sta_flag(sta, WLAN_STA_DECAP_OFFLOAD);
+ 	else
+ 		set_offload = test_and_clear_sta_flag(sta, WLAN_STA_DECAP_OFFLOAD);