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Date:	Mon, 14 May 2012 22:12:18 -0400
From:	Paul Gortmaker <>
To:	<>, <>
Subject: [34-longterm 042/179] PCI: Add quirk for setting valid class for TI816X Endpoint

From: Hemant Pedanekar <>

    This is a commit scheduled for the next v2.6.34 longterm release.
    If you see a problem with using this for longterm, please comment.

commit 63c4408074cbcc070ac17fc10e524800eb9bd0b0 upstream.

TI816X (common name for DM816x/C6A816x/AM389x family) devices configured
to boot as PCIe Endpoint have class code = 0. This makes kernel PCI bus
code to skip allocating BARs to these devices resulting into following
type of error when trying to enable them:

"Device 0000:01:00.0 not available because of resource collisions"

The device cannot be operated because of the above issue.

This patch adds a ID specific (TI VENDOR ID and 816X DEVICE ID based)
'early' fixup quirk to replace class code with

Signed-off-by: Hemant Pedanekar <>
Signed-off-by: Jesse Barnes <>
Signed-off-by: Paul Gortmaker <>
 drivers/pci/quirks.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 46aca60..6938fdc 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2682,6 +2682,16 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x342e, vtd_mask_spec_errors);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors);
+static void __devinit fixup_ti816x_class(struct pci_dev* dev)
+	/* TI 816x devices do not have class code set when in PCIe boot mode */
+	if (dev->class == PCI_CLASS_NOT_DEFINED) {
+		dev_info(&dev->dev, "Setting PCI class for 816x PCIe device\n");
+	}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_TI, 0xb800, fixup_ti816x_class);
 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
 			  struct pci_fixup *end)

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