From 4f03c1ed8901a01ad4abcef95c02c007a2d481c2 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Fri, 29 Jun 2012 12:47:03 +0200 Subject: [PATCH] cfg80211: refuse to .set_monitor_channel when non-monitors are present Having .set_monitor_channel work with non-monitor interfaces running would make interface combinations accounting ambiguous. Signed-off-by: Michal Kazior Signed-off-by: Johannes Berg --- net/wireless/chan.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 167e7cb60089..019401b0b5e3 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -85,6 +85,8 @@ int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, if (!rdev->ops->set_monitor_channel) return -EOPNOTSUPP; + if (!cfg80211_has_monitors_only(rdev)) + return -EBUSY; chan = rdev_freq_to_chan(rdev, freq, chantype); if (!chan) -- 2.30.2