From 282f33c98618a3877043ec9dd5ac777c5e7c117d Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 8 Jun 2006 22:19:44 -0700 Subject: [PATCH] [PATCH] e1000: prevent statistics from getting garbled during reset If a PCI bus error/fault triggers a PCI bus reset, attempts to get the ethernet packet count statistics from the hardware will fail, returning garbage data upstream. This patch skips statistics data collection if the PCI device is not on the bus. This patch presumes that an earlier patch, [PATCH] PCI Error Recovery: e1000 network device driver has already been applied. Signed-off-by: Linas Vepstas Cc: John Ronciak Cc: Jesse Brandeburg Cc: Jeff Kirsher Cc: Jeff Garzik Signed-off-by: Andrew Morton Signed-off-by: Jeff Garzik --- drivers/net/e1000/e1000_main.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 56c7492e3e91..a373ccb308d8 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -3045,14 +3045,20 @@ void e1000_update_stats(struct e1000_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; + struct pci_dev *pdev = adapter->pdev; unsigned long flags; uint16_t phy_tmp; #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF - /* Prevent stats update while adapter is being reset */ + /* + * Prevent stats update while adapter is being reset, or if the pci + * connection is down. + */ if (adapter->link_speed == 0) return; + if (pdev->error_state && pdev->error_state != pci_channel_io_normal) + return; spin_lock_irqsave(&adapter->stats_lock, flags);