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authorJohannes Berg <johannes.berg@intel.com>2016-01-27 15:29:34 +0300
committerJohannes Berg <johannes.berg@intel.com>2016-01-29 19:13:43 +0300
commitcb150b9d23be6ee7f3a0fff29784f1c5b5ac514d (patch)
tree616d91ae927e048344c8852a41a08898103794bd /include/net/iw_handler.h
parent8bf862739a7786ae72409220914df960a0aa80d8 (diff)
downloadlinux-cb150b9d23be6ee7f3a0fff29784f1c5b5ac514d.tar.xz
cfg80211/wext: fix message ordering
Since cfg80211 frequently takes actions from its netdev notifier call, wireless extensions messages could still be ordered badly since the wext netdev notifier, since wext is built into the kernel, runs before the cfg80211 netdev notifier. For example, the following can happen: 5: wlan1: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN group default link/ether 02:00:00:00:01:00 brd ff:ff:ff:ff:ff:ff 5: wlan1: <BROADCAST,MULTICAST,UP> link/ether when setting the interface down causes the wext message. To also fix this, export the wireless_nlevent_flush() function and also call it from the cfg80211 notifier. Cc: stable@vger.kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net/iw_handler.h')
-rw-r--r--include/net/iw_handler.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/iw_handler.h b/include/net/iw_handler.h
index 8f81bbbc38fc..e0f4109e64c6 100644
--- a/include/net/iw_handler.h
+++ b/include/net/iw_handler.h
@@ -439,6 +439,12 @@ int dev_get_wireless_info(char *buffer, char **start, off_t offset, int length);
/* Send a single event to user space */
void wireless_send_event(struct net_device *dev, unsigned int cmd,
union iwreq_data *wrqu, const char *extra);
+#ifdef CONFIG_WEXT_CORE
+/* flush all previous wext events - if work is done from netdev notifiers */
+void wireless_nlevent_flush(void);
+#else
+static inline void wireless_nlevent_flush(void) {}
+#endif
/* We may need a function to send a stream of events to user space.
* More on that later... */