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wifi: mac80211: fix rx link assignment for non-MLO stations

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[ Upstream commit cc2b722132893164bcb3cee4f08ed056e126eb6c ]

Currently, ieee80211_rx_data_set_sta() does not correctly handle the
case where the interface supports multiple links (MLO), but the station
does not (non-MLO). This can lead to incorrect link assignment or
unexpected warnings when accessing link information.

Hence, add a fix to check if the station lacks valid link support and
use its default link ID for rx->link assignment. If the station
unexpectedly has valid links, fall back to the default link.

This ensures correct link association and prevents potential issues
in mixed MLO/non-MLO environments.

Signed-off-by: Hari Chandrakanthan <quic_haric@quicinc.com>
Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
Link: https://patch.msgid.link/20250630084119.3583593-1-quic_sarishar@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hari Chandrakanthan
2025-06-30 14:11:19 +05:30
committed by Greg Kroah-Hartman
parent f7bc50927b
commit e457e0560b
1 changed files with 9 additions and 3 deletions
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12
net/mac80211/rx.c
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@@ -4221,10 +4221,16 @@ static bool ieee80211_rx_data_set_sta(struct ieee80211_rx_data *rx,
rx->link_sta = NULL;
}
if (link_id < 0)
rx->link = &rx->sdata->deflink;
else if (!ieee80211_rx_data_set_link(rx, link_id))
if (link_id < 0) {
if (ieee80211_vif_is_mld(&rx->sdata->vif) &&
sta && !sta->sta.valid_links)
rx->link =
rcu_dereference(rx->sdata->link[sta->deflink.link_id]);
else
rx->link = &rx->sdata->deflink;
} else if (!ieee80211_rx_data_set_link(rx, link_id)) {
return false;
}
return true;
}