PCI: Fix TI816X class code quirk

commit d1541dc9 upstream.

In fixup_ti816x_class(), we assigned "class = PCI_CLASS_MULTIMEDIA_VIDEO".
But PCI_CLASS_MULTIMEDIA_VIDEO is only the two-byte base class/sub-class
and needs to be shifted to make space for the low-order interface byte.

Shift PCI_CLASS_MULTIMEDIA_VIDEO to set the correct class code.

Fixes: 63c44080 ("PCI: Add quirk for setting valid class for TI816X Endpoint")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Hemant Pedanekar <hemantp@ti.com>
[bwh: Backported to 3.2: the class check is done in this function as there
 is no DECLARE_PCI_FIXUP_CLASS_EARLY()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/pci/quirks.c

@@ -2875,8 +2875,9 @@ 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");
-		dev->class = PCI_CLASS_MULTIMEDIA_VIDEO;
+		dev->class = PCI_CLASS_MULTIMEDIA_VIDEO << 8;
+		dev_info(&dev->dev, "PCI class overridden (%#08x -> %#08x)\n",
+			 PCI_CLASS_NOT_DEFINED, dev->class);
 	}
 }
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_TI, 0xb800, fixup_ti816x_class);