From d2a900365b8963d7ca46f05d8e7176d1be3cc71d Mon Sep 17 00:00:00 2001 From: "broonie@sirena.org.uk" Date: Wed, 14 Mar 2007 19:49:15 +0000 Subject: natsemi: Avoid IntrStatus lossage if RX state machine resets. This patch fixes the poll routine for the natsemi driver so that if the driver detects an RX state machine lockup then no interrupts will be lost while the driver recovers from that. Signed-Off-By: Mark Brown Signed-off-by: Jeff Garzik --- drivers/net/natsemi.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c index 5f88200724e6..349b96a3ec4c 100644 --- a/drivers/net/natsemi.c +++ b/drivers/net/natsemi.c @@ -2169,6 +2169,14 @@ static int natsemi_poll(struct net_device *dev, int *budget) dev->name, np->intr_status, readl(ioaddr + IntrMask)); + /* netdev_rx() may read IntrStatus again if the RX state + * machine falls over so do it first. */ + if (np->intr_status & + (IntrRxDone | IntrRxIntr | RxStatusFIFOOver | + IntrRxErr | IntrRxOverrun)) { + netdev_rx(dev, &work_done, work_to_do); + } + if (np->intr_status & (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) { spin_lock(&np->lock); @@ -2180,12 +2188,6 @@ static int natsemi_poll(struct net_device *dev, int *budget) if (np->intr_status & IntrAbnormalSummary) netdev_error(dev, np->intr_status); - if (np->intr_status & - (IntrRxDone | IntrRxIntr | RxStatusFIFOOver | - IntrRxErr | IntrRxOverrun)) { - netdev_rx(dev, &work_done, work_to_do); - } - *budget -= work_done; dev->quota -= work_done; -- cgit v1.2.3