rndis_wlan: check if set_multicast_list work is already scheduled

Don't queue set_multicast_list work if WORK_SET_MULTICAST_LIST
flag already set.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c
index c281c0b35ed4..ad46a0ba6e64 100644
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -2272,6 +2272,9 @@ static void rndis_wext_set_multicast_list(struct net_device *dev)
         struct usbnet *usbdev = dev->priv;
         struct rndis_wext_private *priv = get_rndis_wext_priv(usbdev);
 
+        if (test_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending))
+                return;
+
         set_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending);
         queue_work(priv->workqueue, &priv->work);
 }