Home Home > GIT Browse
diff options
authorMichal Schmidt <mschmidt@redhat.com>2009-04-14 15:16:55 -0700
committerDavid S. Miller <davem@davemloft.net>2009-04-14 15:16:55 -0700
commitd119b3927994e3d620d6adb0dd1ea6bf24427875 (patch)
parentfc59f9a3bf8096a1f68a8b78ada7a0e0ab9236b2 (diff)
skge: fix occasional BUG during MTU change
The BUG_ON(skge->tx_ring.to_use != skge->tx_ring.to_clean) in skge_up() was sometimes observed when setting MTU. skge_down() disables the TX queue, but then reenables it by mistake via skge_tx_clean(). Fix it by moving the waking of the queue from skge_tx_clean() to the other caller. And to make sure start_xmit is not in progress on another CPU, skge_down() should call netif_tx_disable(). The bug was reported to me by Jiri Jilek whose Debian system sometimes failed to boot. He tested the patch and the bug did not happen anymore. Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index b8978d4af1b7..c11cdd08ec57 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -2674,7 +2674,7 @@ static int skge_down(struct net_device *dev)
if (netif_msg_ifdown(skge))
printk(KERN_INFO PFX "%s: disabling interface\n", dev->name);
- netif_stop_queue(dev);
+ netif_tx_disable(dev);
if (hw->chip_id == CHIP_ID_GENESIS && hw->phy_type == SK_PHY_XMAC)
@@ -2881,7 +2881,6 @@ static void skge_tx_clean(struct net_device *dev)
skge->tx_ring.to_clean = e;
- netif_wake_queue(dev);
static void skge_tx_timeout(struct net_device *dev)
@@ -2893,6 +2892,7 @@ static void skge_tx_timeout(struct net_device *dev)
skge_write8(skge->hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_STOP);
+ netif_wake_queue(dev);
static int skge_change_mtu(struct net_device *dev, int new_mtu)