PCI: Add quirk for setting valid class for TI816X Endpoint

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
PCI_CLASS_MULTIMEDIA_VIDEO as class.

Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 3eb4a3d0d134f36a77b40f9ea895c0fac87ac638..087998119c243299c53db0168ab7c4d2a89ecca6 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2537,6 +2537,16 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4375,
 
 #endif /* CONFIG_PCI_MSI */
 
+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;
+       }
+}
+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)
 {