Le 14/05/2015 00:01, Nathan Sullivan a écrit : > Describe the handler for RXUBR better with a new comment. > > Signed-off-by: Nathan Sullivan <[email protected]> > Reviewied-by: Josh Cartwright <[email protected]> > Reviewied-by: Ben Shelton <[email protected]>
Thanks Nathan: good that you've added this comment! Acked-by: Nicolas Ferre <[email protected]> > --- > drivers/net/ethernet/cadence/macb.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/net/ethernet/cadence/macb.c > b/drivers/net/ethernet/cadence/macb.c > index 61aa570..5f10dfc 100644 > --- a/drivers/net/ethernet/cadence/macb.c > +++ b/drivers/net/ethernet/cadence/macb.c > @@ -1037,6 +1037,12 @@ static irqreturn_t macb_interrupt(int irq, void > *dev_id) > * add that if/when we get our hands on a full-blown MII PHY. > */ > > + /* There is a hardware issue under heavy load where DMA can > + * stop, this causes endless "used buffer descriptor read" > + * interrupts but it can be cleared by re-enabling RX. See > + * the at91 manual, section 41.3.1 or the Zynq manual > + * section 16.7.4 for details. > + */ > if (status & MACB_BIT(RXUBR)) { > ctrl = macb_readl(bp, NCR); > macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE)); > -- Nicolas Ferre -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
