Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0c254d863338ceff630814bf17cf8e4b61cb8aa3
Commit: 0c254d863338ceff630814bf17cf8e4b61cb8aa3
Parent: 23b66e2bc2bcebacab7292d7731b7372065b3f98
Author: Auke Kok <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 11 09:25:56 2008 -0800
Committer: Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Mon Feb 11 14:51:40 2008 -0500
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 <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
drivers/net/ixgbe/ixgbe_main.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
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);
-
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