From: Auke Kok <auke-jan.h.kok@intel.com>
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-Url: https://git.stricted.de/?a=commitdiff_plain;h=0c254d863338ceff630814bf17cf8e4b61cb8aa3;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.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 <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index ead49e54f31..576fb51eb74 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);