From: Russell King Date: Wed, 2 Sep 2015 09:24:14 +0000 (+0800) Subject: net: fec: clear receive interrupts before processing a packet X-Git-Tag: v4.3-rc1~96^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ed63f1dcd5788d36f942fbcce350742385e3e18c;p=profile%2Fcommon%2Fplatform%2Fkernel%2Flinux-artik7.git net: fec: clear receive interrupts before processing a packet The patch just to re-submit the patch "db3421c114cfa6326" because the patch "4d494cdc92b3b9a0" remove the change. Clear any pending receive interrupt before we process a pending packet. This helps to avoid any spurious interrupts being raised after we have fully cleaned the receive ring, while still allowing an interrupt to be raised if we receive another packet. The position of this is critical: we must do this prior to reading the next packet status to avoid potentially dropping an interrupt when a packet is still pending. Acked-by: Fugang Duan Signed-off-by: Russell King Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 4d5c1ba..91925e3 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -1407,6 +1407,7 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id) if ((status & BD_ENET_RX_LAST) == 0) netdev_err(ndev, "rcv is not +last\n"); + writel(FEC_ENET_RXF, fep->hwp + FEC_IEVENT); /* Check for errors. */ if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |