@@ -116,8 +116,14 @@ void drv_remove_interface(struct ieee80211_local *local,
sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
- /* Remove driver debugfs entries */
- ieee80211_debugfs_recreate_netdev(sdata, sdata->vif.valid_links);
+ /*
+ * Remove driver debugfs entries.
+ * The virtual monitor interface doesn't get a debugfs
+ * entry, so it's exempt here.
+ */
+ if (sdata != local->monitor_sdata)
+ ieee80211_debugfs_recreate_netdev(sdata,
+ sdata->vif.valid_links);
trace_drv_remove_interface(local, sdata);
local->ops->remove_interface(&local->hw, &sdata->vif);
@@ -1203,16 +1203,17 @@ void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
return;
}
- RCU_INIT_POINTER(local->monitor_sdata, NULL);
- mutex_unlock(&local->iflist_mtx);
-
- synchronize_net();
-
+ clear_bit(SDATA_STATE_RUNNING, &sdata->state);
ieee80211_link_release_channel(&sdata->deflink);
if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
drv_remove_interface(local, sdata);
+ RCU_INIT_POINTER(local->monitor_sdata, NULL);
+ mutex_unlock(&local->iflist_mtx);
+
+ synchronize_net();
+
kfree(sdata);
}
Don't call ieee80211_debugfs_recreate_netdev() for virtual monitor interface when deleting it. The virtual monitor interface shouldn't have debugfs entries and trying to update them will *create* them on deletion. And when the virtual monitor interface is created/destroyed multiple times we'll get warnings about debugfs name conflicts. Signed-off-by: Alexander Wetzel <Alexander@wetzel-home.de> --- That was a bit more tricky than expected: local->monitor_sdata is normally already deleted when we call drv_remove_interface. And we can't simply skip the call for all monitor interfaces... And one additional remark: My iwlmvm card is not taking it well when I bring down the monitor interface while TXing on it. The firmware crashes for my "Alder Lake-S PCH CNVi WiFi" card. But that also happens with unpatched kernels and so I don't care much about that. I can make a bug report, if that's news and want you to look into that. Alexander --- net/mac80211/driver-ops.c | 10 ++++++++-- net/mac80211/iface.c | 11 ++++++----- 2 files changed, 14 insertions(+), 7 deletions(-)