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authorbroonie@sirena.org.uk <broonie@sirena.org.uk>2007-03-14 19:49:15 +0000
committerJeff Garzik <jeff@garzik.org>2007-03-15 10:59:54 -0400
commitd2a900365b8963d7ca46f05d8e7176d1be3cc71d (patch)
tree0b9d41bd52d414bdc75dab81a746b2c0d9175cc9
parent069f8256362b7a17da532f0631cee73b4cfee65b (diff)
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 <broonie@sirena.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--drivers/net/natsemi.c14
1 files changed, 8 insertions, 6 deletions
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;