git: 87cb97dcdef3 - stable/14 - LinuxKPI: 802.11: move rx_nss check to be at least 1 into sync function

The branch stable/14 has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=87cb97dcdef3f2f271d5fcad6a1155408f0b4a97

commit 87cb97dcdef3f2f271d5fcad6a1155408f0b4a97
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2025-05-14 00:30:00 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2025-06-10 23:37:53 +0000

    LinuxKPI: 802.11: move rx_nss check to be at least 1 into sync function
    
    We set rx_nss to at least 1 and the sync functions for HT and VHT are
    careful not to set it to 0.   Rather than relying on that and any
    possible future call to lkpi_sta_sync_from_ni() migrate the MAX()
    call into the sync function after each standard level went through
    to make sure that at the end we at least have rx_nss set to 1.
    
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit 34c150cc5fdb3c599bb6ff14eb56afee00c45258)
---
 sys/compat/linuxkpi/common/src/linux_80211.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sys/compat/linuxkpi/common/src/linux_80211.c b/sys/compat/linuxkpi/common/src/linux_80211.c
index e79ee01a6b32..ffa1c1f23339 100644
--- a/sys/compat/linuxkpi/common/src/linux_80211.c
+++ b/sys/compat/linuxkpi/common/src/linux_80211.c
@@ -619,6 +619,13 @@ lkpi_sta_sync_from_ni(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 #if defined(LKPI_80211_VHT)
 	lkpi_sta_sync_vht_from_ni(vif, sta, ni);
 #endif
+
+	/*
+	 * Ensure rx_nss is at least 1 as otherwise drivers run into
+	 * unexpected problems.
+	 */
+	sta->deflink.rx_nss = MAX(1, sta->deflink.rx_nss);
+
 	/*
 	 * We are also called from node allocation which net80211
 	 * can do even on `ifconfig down`; in that case the chanctx
@@ -2938,7 +2945,6 @@ lkpi_sta_assoc_to_run(struct ieee80211vap *vap, enum ieee80211_state nstate, int
 		IMPROVE("net80211 does not consider node authorized");
 	}
 
-	sta->deflink.rx_nss = MAX(1, sta->deflink.rx_nss);
 	IMPROVE("Is this the right spot, has net80211 done all updates already?");
 	lkpi_sta_sync_from_ni(hw, vif, sta, ni, true);