From: Auke Kok Date: Mon, 11 Feb 2008 17:25:56 +0000 (-0800) Subject: ixgbe: warn when device is in a x4 or lower width slot X-Git-Tag: v3.12-rc1~22667^2~61^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0c254d863338ceff630814bf17cf8e4b61cb8aa3;p=kernel%2Fkernel-generic.git 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 --- diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index ead49e5..576fb51 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);