[openwrt/openwrt] mac80211: fix decap offload for stations on AP_VLAN interfaces

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/eb07020de2b4a5f89579f09f5060d4b9f070a356

commit eb07020de2b4a5f89579f09f5060d4b9f070a356
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Wed Sep 28 13:57:55 2022 +0200

    mac80211: fix decap offload for stations on AP_VLAN interfaces
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 ...11-fix-decap-offload-for-stations-on-AP_V.patch | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/package/kernel/mac80211/patches/subsys/343-wifi-mac80211-fix-decap-offload-for-stations-on-AP_V.patch b/package/kernel/mac80211/patches/subsys/343-wifi-mac80211-fix-decap-offload-for-stations-on-AP_V.patch
new file mode 100644
index 0000000000..0feb408d21
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/343-wifi-mac80211-fix-decap-offload-for-stations-on-AP_V.patch
@@ -0,0 +1,37 @@
+From: Felix Fietkau <nbd at nbd.name>
+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 <howard-yh.hsu at mediatek.com>
+Fixes: 80a915ec4427 ("mac80211: add rx decapsulation offload support")
+Signed-off-by: Felix Fietkau <nbd at nbd.name>
+---
+
+--- 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);