linux-kernel - [PATCH 3.13 11/99] mac80211: release the channel in error path in start

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Date:	Thu, 20 Feb 2014 15:52:06 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
	Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH 3.13 11/99] mac80211: release the channel in error path in start_ap

3.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Emmanuel Grumbach <emmanuel.grumbach@...el.com>

commit 0297ea17bf7879fb5846fafd1be4c0471e72848d upstream.

When the driver cannot start the AP or when the assignement
of the beacon goes wrong, we need to unassign the vif.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/mac80211/cfg.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -995,8 +995,10 @@ static int ieee80211_start_ap(struct wip
 					IEEE80211_P2P_OPPPS_ENABLE_BIT;
 
 	err = ieee80211_assign_beacon(sdata, &params->beacon);
-	if (err < 0)
+	if (err < 0) {
+		ieee80211_vif_release_channel(sdata);
 		return err;
+	}
 	changed |= err;
 
 	err = drv_start_ap(sdata->local, sdata);
@@ -1005,6 +1007,7 @@ static int ieee80211_start_ap(struct wip
 		if (old)
 			kfree_rcu(old, rcu_head);
 		RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
+		ieee80211_vif_release_channel(sdata);
 		return err;
 	}
 


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