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Date: Thu, 3 Sep 2015 10:00:14 +0200 From: Philippe De Muyter <phdm@...q.eu> To: Fugang Duan <b38611@...escale.com> Cc: davem@...emloft.net, netdev@...r.kernel.org, linux@....linux.org.uk Subject: Re: [PATCH net-next 1/1] net: fec: clear receive interrupts before processing a packet Hi Andy, can you resubmit it, adding also my Reported-by: Philippe De Muyter <phdm@...qel.be> and explaining that it also prevents a complete rx blockage failure ? Philippe On Wed, Sep 02, 2015 at 11:40:15AM +0200, Philippe De Muyter wrote: > On Wed, Sep 02, 2015 at 05:24:14PM +0800, Fugang Duan wrote: > > From: Russell King <rmk+kernel@....linux.org.uk> > > > > The patch just to re-submit the patch "db3421c114cfa6326" because the > > patch "4d494cdc92b3b9a0" remove the change. > > I think you should mention also the titles of the commits. > > And maybe send it also to stable. > > > > 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@...escale.com> > > Signed-off-by: Russell King <rmk+kernel@....linux.org.uk> > > --- > > drivers/net/ethernet/freescale/fec_main.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c > > index 1f89c59..6bed0ff 100644 > > --- a/drivers/net/ethernet/freescale/fec_main.c > > +++ b/drivers/net/ethernet/freescale/fec_main.c > > @@ -1400,6 +1400,7 @@ 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"); > > > Could a comment be added here to avoid another future removal ? > > > + 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 | > > -- > > 1.9.1 > > Philippe -- Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles -- 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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