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[15/17] wifi: mac80211: ibss: stop transmit when merging IBSS

Message ID 20250102161730.83b58167e80e.I538751fbe1b4302d20f6ed80afb024bca6a2dbf5@changeid (mailing list archive)
State New
Delegated to: Johannes Berg
Headers show
Series wifi: mac80211: updates - 02-01-24 | expand

Commit Message

Miri Korenblit Jan. 2, 2025, 2:20 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

We disable the carrier, but that doesn't immediately take
effect, and as such a concurrent transmit can go into the
driver while drv_leave_ibss() is happening and confuse it.
Synchronize to avoid that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/ibss.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index a1b4178deccf..dfa125219e47 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -245,6 +245,7 @@  static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 		sdata->vif.cfg.ibss_creator = false;
 		sdata->vif.bss_conf.enable_beacon = false;
 		netif_carrier_off(sdata->dev);
+		synchronize_net();
 		ieee80211_bss_info_change_notify(sdata,
 						 BSS_CHANGED_IBSS |
 						 BSS_CHANGED_BEACON_ENABLED);