wifi: cfg80211: ensure UHR ML-PM flag is consistent

We check that extended MLD capabilities and operations are
consistent across APs in an AP MLD, but didn't check reserved
fields since they could be defined to differ. Check bit 8 now
since it's defined by UHR to be consistent.

Link: https://patch.msgid.link/20260428110915.34158027395b.I9df13d3f2588d79294559fad64182acc9edf3f30@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 50ee462e5eac43272e92ac6b9ff7be118032e44a..2a2c173058bacada2f36a05f88742b487e8f60c8 100644 (file)
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -361,17 +361,18 @@ cfg80211_mlme_check_mlo_compat(const struct ieee80211_multi_link_elem *mle_a,
         * reserved when included in a unicast Probe Response frame and may
         * also change when the AP adds/removes links. The BTM MLD
         * Recommendation For Multiple APs Support subfield is reserved when
-        * transmitted by an AP. All other bits are currently reserved.
-        * See IEEE P802.11be/D7.0, Table 9-417o.
+        * transmitted by an AP.
         */
        if ((ieee80211_mle_get_ext_mld_capa_op((const u8 *)mle_a) &
             (IEEE80211_EHT_ML_EXT_MLD_CAPA_OP_PARAM_UPDATE |
              IEEE80211_EHT_ML_EXT_MLD_CAPA_NSTR_UPDATE |
-             IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK)) !=
+             IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK |
+             IEEE80211_UHR_ML_EXT_MLD_CAPA_ML_PM)) !=
            (ieee80211_mle_get_ext_mld_capa_op((const u8 *)mle_b) &
             (IEEE80211_EHT_ML_EXT_MLD_CAPA_OP_PARAM_UPDATE |
              IEEE80211_EHT_ML_EXT_MLD_CAPA_NSTR_UPDATE |
-             IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK))) {
+             IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK |
+             IEEE80211_UHR_ML_EXT_MLD_CAPA_ML_PM))) {
                NL_SET_ERR_MSG(extack,
                               "extended link MLD capabilities/ops mismatch");
                return -EINVAL;