1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtl8187.h b/drivers/net/wireless/rtl8187.h
index 1b0d750f6623..5a9515c99960 100644
--- a/drivers/net/wireless/rtl8187.h
+++ b/drivers/net/wireless/rtl8187.h
@@ -94,6 +94,10 @@ struct rtl8187_priv {
         const struct rtl818x_rf_ops *rf;
         struct ieee80211_vif *vif;
         int mode;
+        /* The mutex protects the TX loopback state.
+         * Any attempt to set channels concurrently locks the device.
+         */
+        struct mutex conf_mutex;
 
         /* rtl8187 specific */
         struct ieee80211_channel channels[14];