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 <auke-jan.h.kok@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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@ -2778,6 +2778,14 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
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hw->mac.type, hw->phy.type,
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(part_num >> 8), (part_num & 0xff));
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if (link_width <= IXGBE_PCI_LINK_WIDTH_4) {
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dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
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"this card is not sufficient for optimal "
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"performance.\n");
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dev_warn(&pdev->dev, "For optimal performance a x8 "
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"PCI-Express slot is required.\n");
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}
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/* reset the hardware with the new settings */
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ixgbe_start_hw(hw);
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