| Message ID | 20241031134223.970-1-quic_lingbok@quicinc.com (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Johannes Berg |
| Headers | show |
| Series | wifi: cfg80211: Remove the Medium Synchronization Delay validity check | expand |
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index 4dac81854721..a5eb92d93074 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -340,12 +340,6 @@ cfg80211_mlme_check_mlo_compat(const struct ieee80211_multi_link_elem *mle_a, return -EINVAL; } - if (ieee80211_mle_get_eml_med_sync_delay((const u8 *)mle_a) != - ieee80211_mle_get_eml_med_sync_delay((const u8 *)mle_b)) { - NL_SET_ERR_MSG(extack, "link EML medium sync delay mismatch"); - return -EINVAL; - } - if (ieee80211_mle_get_eml_cap((const u8 *)mle_a) != ieee80211_mle_get_eml_cap((const u8 *)mle_b)) { NL_SET_ERR_MSG(extack, "link EML capabilities mismatch");
Currently, when the driver attempts to connect to an AP MLD with multiple APs, the cfg80211_mlme_check_mlo_compat() function requires the Medium Synchronization Delay values from different APs of the same AP MLD to be equal, which may result in connection failures. This is because when the driver receives a multi-link probe response from an AP MLD with multiple APs, cfg80211 updates the Elements for each AP based on the multi-link probe response. If the Medium Synchronization Delay is set in the multi-link probe response, the Elements for each AP belonging to the same AP MLD will have the Medium Synchronization Delay set simultaneously. If non-multi-link probe responses are received from different APs of the same MLD AP, cfg80211 will still update the Elements based on the non-multi-link probe response. Since the non-multi-link probe response does not set the Medium Synchronization Delay (IEEE 802.11be-2024-35.3.4.4), if the Elements from a non-multi-link probe response overwrite those from a multi-link probe response that has set the Medium Synchronization Delay, the Medium Synchronization Delay values for APs belonging to the same AP MLD will not be equal. This discrepancy causes the cfg80211_mlme_check_mlo_compat() function to fail, leading to connection failures. Commit ccb964b4ab16 ("wifi: cfg80211: validate MLO connections better") did not take this into account. To address this issue, remove this validity check. Fixes: ccb964b4ab16 ("wifi: cfg80211: validate MLO connections better") Signed-off-by: Lingbo Kong <quic_lingbok@quicinc.com> --- net/wireless/mlme.c | 6 ------ 1 file changed, 6 deletions(-) base-commit: e7e2957f403ba4655199f2ba9920c1a015a7be44