From 0c254d863338ceff630814bf17cf8e4b61cb8aa3 Mon Sep 17 00:00:00 2001 From: Auke Kok Date: Mon, 11 Feb 2008 09:25:56 -0800 Subject: [PATCH] ixgbe: warn when device is in a x4 or lower width slot It's easy to oversee this issue when working with this card as evrything will work OK but performance is severely limited (something like 1.5gbit on a x1 link) if the pci-express slot does not offer more bandwidth. Signed-off-by: Auke Kok Signed-off-by: Jeff Garzik --- drivers/net/ixgbe/ixgbe_main.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index ead49e54f31b..576fb51eb748 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -2778,6 +2778,14 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev, hw->mac.type, hw->phy.type, (part_num >> 8), (part_num & 0xff)); + if (link_width <= IXGBE_PCI_LINK_WIDTH_4) { + dev_warn(&pdev->dev, "PCI-Express bandwidth available for " + "this card is not sufficient for optimal " + "performance.\n"); + dev_warn(&pdev->dev, "For optimal performance a x8 " + "PCI-Express slot is required.\n"); + } + /* reset the hardware with the new settings */ ixgbe_start_hw(hw); -- GitLab