From: Ivan Vecera Date: Thu, 27 Jan 2011 11:24:11 +0000 (+0100) Subject: r8169: use RxFIFO overflow workaround for 8168c chipset. X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=b5ba6d12bdac21bc0620a5089e0f24e362645efd;p=linux-edison.git r8169: use RxFIFO overflow workaround for 8168c chipset. I found that one of the 8168c chipsets (concretely XID 1c4000c0) starts generating RxFIFO overflow errors. The result is an infinite loop in interrupt handler as the RxFIFOOver is handled only for ...MAC_VER_11. With the workaround everything goes fine. Signed-off-by: Ivan Vecera Acked-by: Francois Romieu Cc: Hayes --- diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index bde7d61f193..9ab3b43c7d0 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -3757,7 +3757,8 @@ static void rtl_hw_start_8168(struct net_device *dev) RTL_W16(IntrMitigate, 0x5151); /* Work around for RxFIFO overflow. */ - if (tp->mac_version == RTL_GIGA_MAC_VER_11) { + if (tp->mac_version == RTL_GIGA_MAC_VER_11 || + tp->mac_version == RTL_GIGA_MAC_VER_22) { tp->intr_event |= RxFIFOOver | PCSTimeout; tp->intr_event &= ~RxOverflow; } @@ -4641,7 +4642,8 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance) /* Work around for rx fifo overflow */ if (unlikely(status & RxFIFOOver) && - (tp->mac_version == RTL_GIGA_MAC_VER_11)) { + (tp->mac_version == RTL_GIGA_MAC_VER_11 || + tp->mac_version == RTL_GIGA_MAC_VER_22)) { netif_stop_queue(dev); rtl8169_tx_timeout(dev); break;