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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>
This commit is contained in:
Auke Kok 2008-02-11 09:25:56 -08:00 committed by Jeff Garzik
parent 23b66e2bc2
commit 0c254d8633
1 changed files with 8 additions and 0 deletions
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8
drivers/net/ixgbe/ixgbe_main.c
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@ -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);