From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
3.4.112-rc1 review patch. If anyone has any objections, please let me know.
------------------
commit d1541dc977d376406f4584d8eb055488655c98ec 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: 63c4408074cb ("PCI: Add quirk for setting valid class for TI816X Endpoint")
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: Hemant Pedanekar <hemantp@xxxxxx>
Signed-off-by: Zefan Li <lizefan@xxxxxxxxxx>
---
drivers/pci/quirks.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index c030024..887af797 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2834,12 +2834,15 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors);
static void __devinit fixup_ti816x_class(struct pci_dev* dev)
{
+ u32 class = dev->class;
+
/* TI 816x devices do not have class code set when in PCIe boot mode */
- 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",
+ class, dev->class);
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_TI, 0xb800,
- PCI_CLASS_NOT_DEFINED, 0, fixup_ti816x_class);
+ PCI_CLASS_NOT_DEFINED, 0, fixup_ti816x_class);
/* Some PCIe devices do not work reliably with the claimed maximum
* payload size supported.
--
1.9.1
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