From b5ba6d12bdac21bc0620a5089e0f24e362645efd Mon Sep 17 00:00:00 2001 From: Ivan Vecera Date: Thu, 27 Jan 2011 12:24:11 +0100 Subject: [PATCH] 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 --- drivers/net/r8169.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index bde7d61..9ab3b43 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; -- 2.7.4