6.15-stable review patch. If anyone has any objections, please let me know.
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From: Aditya Kumar Singh aditya.kumar.singh@oss.qualcomm.com
[ Upstream commit 78a7a126dc5b8e3c5a3d4da9f513e0236d2dc1a3 ]
When an AP interface is already beaconing, a subsequent scan is not allowed unless the user space explicitly sets the flag NL80211_SCAN_FLAG_AP in the scan request. If this flag is not set, the scan request will be returned with the error code -EOPNOTSUPP. However, this restriction currently applies only to non-ML interfaces. For ML interfaces, scans are allowed without this flag being explicitly set by the user space which is wrong. This is because the beaconing check currently uses only the deflink, which does not get set during MLO.
Hence to fix this, during MLO, use the existing helper ieee80211_num_beaconing_links() to know if any of the link is beaconing.
Signed-off-by: Aditya Kumar Singh aditya.kumar.singh@oss.qualcomm.com Link: https://patch.msgid.link/20250516-bug_fix_mlo_scan-v2-1-12e59d9110ac@oss.qua... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/cfg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 9f683f838431d..acfde525fad2f 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2904,7 +2904,7 @@ static int ieee80211_scan(struct wiphy *wiphy, * the frames sent while scanning on other channel will be * lost) */ - if (sdata->deflink.u.ap.beacon && + if (ieee80211_num_beaconing_links(sdata) && (!(wiphy->features & NL80211_FEATURE_AP_SCAN) || !(req->flags & NL80211_SCAN_FLAG_AP))) return -EOPNOTSUPP;