net: mac80211: always pretend 1 Mbit/s as mesh basic rate

In order to be backwards-compatible, pretend to have 1 Mbit/s 802.11b as
basic rate regardless of the actual setting. This is required to keep
compatibility with other non-patched mesh neighbors.

Signed-off-by: David Bauer <mail@david-bauer.net>

patches/openwrt/0008-net-mac80211-always-pretend-1-Mbit-s-as-mesh-basic-rate.patch

+From: David Bauer <mail@david-bauer.net>
+Date: Tue, 7 Jan 2025 00:49:41 +0100
+Subject: net: mac80211: always pretend 1 Mbit/s as mesh basic rate
+
+In order to be backwards-compatible, pretend to have 1 Mbit/s 802.11b as
+basic rate regardless of the actual setting. This is required to keep
+compatibility with other non-patched mesh neighbors.
+
+Signed-off-by: David Bauer <mail@david-bauer.net>
+
+diff --git a/package/kernel/mac80211/patches/subsys/996-net-mac80211-always-pretend-1-Mbit-s-as-mesh-basic-r.patch b/package/kernel/mac80211/patches/subsys/996-net-mac80211-always-pretend-1-Mbit-s-as-mesh-basic-r.patch
+new file mode 100644
+index 0000000000000000000000000000000000000000..becb17317abb9782d4827a38c232b58939246ae1
+--- /dev/null
++++ b/package/kernel/mac80211/patches/subsys/996-net-mac80211-always-pretend-1-Mbit-s-as-mesh-basic-r.patch
+@@ -0,0 +1,44 @@
++From 70c1812fa170ee35cdc576c886bed4bfaae1d23c Mon Sep 17 00:00:00 2001
++From: David Bauer <mail@david-bauer.net>
++Date: Tue, 7 Jan 2025 00:47:33 +0100
++Subject: [PATCH] net: mac80211: always pretend 1 Mbit/s as mesh basic rate
++
++In order to be backwards-compatible, pretend to have 1 Mbit/s 802.11b as
++basic rate regardless of the actual setting. This is required to keep
++compatibility with other non-patched mesh neighbors.
++
++Signed-off-by: David Bauer <mail@david-bauer.net>
++---
++ net/mac80211/util.c | 4 ++--
++ 1 file changed, 2 insertions(+), 2 deletions(-)
++
++--- a/net/mac80211/mesh.c
+++++ b/net/mac80211/mesh.c
++@@ -1093,7 +1093,7 @@ ieee80211_mesh_build_beacon(struct ieee8
++ 	rcu_read_unlock();
++ 
++ 	if (ieee80211_put_srates_elem(skb, sband,
++-				      sdata->vif.bss_conf.basic_rates,
+++				      BIT(0),
++ 				      rate_flags, 0, WLAN_EID_SUPP_RATES) ||
++ 	    mesh_add_ds_params_ie(sdata, skb))
++ 		goto out_free;
++@@ -1106,7 +1106,7 @@ ieee80211_mesh_build_beacon(struct ieee8
++ 	bcn->tail = bcn->head + bcn->head_len;
++ 
++ 	if (ieee80211_put_srates_elem(skb, sband,
++-				      sdata->vif.bss_conf.basic_rates,
+++				      BIT(0),
++ 				      rate_flags, 0, WLAN_EID_EXT_SUPP_RATES) ||
++ 	    mesh_add_rsn_ie(sdata, skb) ||
++ 	    mesh_add_ht_cap_ie(sdata, skb) ||
++--- a/net/mac80211/mesh_plink.c
+++++ b/net/mac80211/mesh_plink.c
++@@ -283,6 +283,7 @@ static int mesh_plink_frame_tx(struct ie
++ 		rate_flags =
++ 			ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chanreq.oper);
++ 		basic_rates = sdata->vif.bss_conf.basic_rates;
+++		basic_rates = BIT(0); /* mandatory rate */
++ 
++ 		if (ieee80211_put_srates_elem(skb, sband, basic_rates,
++ 					      rate_flags, 0,