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wifi: mac80211: correctly check if CSA is active

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We are not adding an interface if an existing one is doing CSA.
But the check won't work for MLO station interfaces, since for those,
vif->bss_conf is zeroed out.
Fix this by checking if any link of the vif has an active CSA.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20260111191912.7ceff62fc561.Ia38d27f42684d1cfd82d930d232bd5dea6ab9282@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Miri Korenblit 2026-01-11 19:19:30 +02:00 committed by Johannes Berg
parent a3034bf074
commit db1d0b6ab1
1 changed files with 6 additions and 2 deletions
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8
net/mac80211/iface.c
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@ -350,6 +350,8 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
/* we hold the RTNL here so can safely walk the list */
list_for_each_entry(nsdata, &local->interfaces, list) {
if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
struct ieee80211_link_data *link;
/*
* Only OCB and monitor mode may coexist
*/
@ -376,8 +378,10 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
* will not add another interface while any channel
* switch is active.
*/
if (nsdata->vif.bss_conf.csa_active)
return -EBUSY;
for_each_link_data(nsdata, link) {
if (link->conf->csa_active)
return -EBUSY;
}
/*
* The remaining checks are only performed for interfaces