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Date: Tue, 08 Jul 2014 12:40:28 +0100 From: Russell King <rmk+kernel@....linux.org.uk> To: "David S. Miller" <davem@...emloft.net> Cc: netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Subject: [PATCH B 07/10] 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 <B38611@...escale.com> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk> --- 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 fc9f6f465e7a..2945cf6e65cf 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); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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