From: Bjorn Helgaas <bhelgaas@google.com>
Date: Fri, 19 Jun 2015 20:58:24 +0000 (-0500)
Subject: PCI: Fix TI816X class code quirk
X-Git-Tag: v4.14-rc1~4826^2^3~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d1541dc977d376406f4584d8eb055488655c98ec;p=platform%2Fkernel%2Flinux-rpi.git

PCI: Fix TI816X class code quirk

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@google.com>
CC: Hemant Pedanekar <hemantp@ti.com>
---

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index afc8151..9734b42 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2835,12 +2835,15 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors);
 
 static void 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.