| From foo@baz Wed Sep 30 05:25:07 CEST 2015 |
| From: Russell King <rmk+kernel@arm.linux.org.uk> |
| Date: Wed, 2 Sep 2015 17:24:14 +0800 |
| Subject: net: fec: clear receive interrupts before processing a packet |
| |
| From: Russell King <rmk+kernel@arm.linux.org.uk> |
| |
| [ Upstream commit ed63f1dcd5788d36f942fbcce350742385e3e18c ] |
| |
| 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 <B38611@freescale.com> |
| Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/net/ethernet/freescale/fec_main.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| --- a/drivers/net/ethernet/freescale/fec_main.c |
| +++ b/drivers/net/ethernet/freescale/fec_main.c |
| @@ -1402,6 +1402,7 @@ fec_enet_rx_queue(struct net_device *nde |
| 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 | |
