From 9a7ba4381af4defa7834c73c8a015532c06f4e8e Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 8 Jul 2014 12:40:28 +0100 Subject: [PATCH] net: fec: quiesce packet processing before stopping device in fec_set_features() fec_set_features() calls fec_stop() to stop the transmit ring while the transmit queue is still active. This can lead to the transmit ring being restarted by an intervening packet queued for transmission, or by the tx quirk timer expiring. Fix this by disabling NAPI (which ensures that the NAPI handlers are not running), and then take the transmit lock while we stop and restart the adapter (which prevents new packets being queued). Acked-by: Fugang Duan Signed-off-by: Russell King Signed-off-by: David S. Miller --- drivers/net/ethernet/freescale/fec_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index fc9f6f4..2945cf6 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -2362,9 +2362,9 @@ static int fec_set_features(struct net_device *netdev, fep->csum_flags &= ~FLAG_RX_CSUM_ENABLED; if (netif_running(netdev)) { - fec_stop(netdev); napi_disable(&fep->napi); netif_tx_lock_bh(netdev); + fec_stop(netdev); fec_restart(netdev, fep->phy_dev->duplex); netif_wake_queue(netdev); netif_tx_unlock_bh(netdev); -- 2.7.4