From 0f8b82456178d558f14011e06ebf9af937c4b197 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Sun, 14 Dec 2014 11:05:53 +0200 Subject: [PATCH] mac80211: avoid reconfig if no interfaces are up If there are no interfaces up, there is no reason to continue the reconfig flow. The current code might end up calling driver callbacks (e.g. resume(), reconfig_complete()) while the driver is already stopped. Signed-off-by: Eliad Peller Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- net/mac80211/util.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 974ebe70f5b0..0f9bf479952e 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1735,6 +1735,10 @@ int ieee80211_reconfig(struct ieee80211_local *local) struct cfg80211_sched_scan_request *sched_scan_req; bool sched_scan_stopped = false; + /* nothing to do if HW shouldn't run */ + if (!local->open_count) + goto wake_up; + #ifdef CONFIG_PM if (local->suspended) local->resuming = true; @@ -1756,9 +1760,6 @@ int ieee80211_reconfig(struct ieee80211_local *local) reconfig_due_to_wowlan = true; } #endif - /* everything else happens only if HW was up & running */ - if (!local->open_count) - goto wake_up; /* * Upon resume hardware can sometimes be goofy due to @@ -2042,7 +2043,7 @@ int ieee80211_reconfig(struct ieee80211_local *local) * If this is for hw restart things are still running. * We may want to change that later, however. */ - if (!local->suspended || reconfig_due_to_wowlan) + if (local->open_count && (!local->suspended || reconfig_due_to_wowlan)) drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); if (!local->suspended) @@ -2054,7 +2055,7 @@ int ieee80211_reconfig(struct ieee80211_local *local) mb(); local->resuming = false; - if (!reconfig_due_to_wowlan) + if (local->open_count && !reconfig_due_to_wowlan) drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); list_for_each_entry(sdata, &local->interfaces, list) { -- 2.39.5