This is a note to let you know that I've just added the patch titled net: fec: clear receive interrupts before processing a packet to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-fec-clear-receive-interrupts-before-processing-a-packet.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Wed Sep 30 05:25:07 CEST 2015 From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx> Date: Wed, 2 Sep 2015 17:24:14 +0800 Subject: net: fec: clear receive interrupts before processing a packet From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx> [ 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@xxxxxxxxxxxxx> Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 | Patches currently in stable-queue which might be from rmk+kernel@xxxxxxxxxxxxxxxx are queue-4.2/net-fec-clear-receive-interrupts-before-processing-a-packet.patch queue-4.2/net-dsa-actually-force-the-speed-on-the-cpu-port.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html