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Date: Tue, 29 Jun 2010 21:28:36 -0700 From: Jeff Kirsher <jeffrey.t.kirsher@...el.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, gospo@...hat.com, bphilips@...ell.com, John Fastabend <john.r.fastabend@...el.com>, Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>, Jeff Kirsher <jeffrey.t.kirsher@...el.com> Subject: [net-2.6 PATCH 2/3] ixgbe: disable tx engine before disabling tx laser From: John Fastabend <john.r.fastabend@...el.com> Disabling the tx laser while receiving DMA requests can hang the device. After this occurs the device is in a bad state. The GPIO bit never clears when PCI master access is disabled and a reboot is required to get the device in a good state again. Signed-off-by: John Fastabend <john.r.fastabend@...el.com> Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com> --- drivers/net/ixgbe/ixgbe_main.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index e237748..7ddd60e 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -3684,10 +3684,6 @@ void ixgbe_down(struct ixgbe_adapter *adapter) /* signal that we are down to the interrupt handler */ set_bit(__IXGBE_DOWN, &adapter->state); - /* power down the optics */ - if (hw->phy.multispeed_fiber) - hw->mac.ops.disable_tx_laser(hw); - /* disable receive for all VFs and wait one second */ if (adapter->num_vfs) { /* ping all the active vfs to let them know we are going down */ @@ -3742,6 +3738,10 @@ void ixgbe_down(struct ixgbe_adapter *adapter) (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) & ~IXGBE_DMATXCTL_TE)); + /* power down the optics */ + if (hw->phy.multispeed_fiber) + hw->mac.ops.disable_tx_laser(hw); + /* clear n-tuple filters that are cached */ ethtool_ntuple_flush(netdev); -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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