From cd76d10b78ab21a7adc4562e016213dd4891b6e5 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 19 Jun 2015 15:28:31 -0500 Subject: [PATCH] PCI: Use PCI_CLASS_SERIAL_USB instead of bare number be6646bfbaec ("PCI: Prevent xHCI driver from claiming AMD Nolan USB3 DRD device") added a quirk to override the PCI class code of the AMD Nolan device. Use PCI_CLASS_SERIAL_USB instead of a bare number to improve greppability. Also add a log message about what we're doing. No functional change except the new message. Signed-off-by: Bjorn Helgaas Acked-by: Huang Rui CC: Jason Chang CC: Felipe Balbi --- drivers/pci/quirks.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 1b9fc4ed39a3..ecaad8f39681 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -424,10 +424,12 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, quirk_ati_ */ static void quirk_amd_nl_class(struct pci_dev *pdev) { - /* - * Use 'USB Device' (0x0c03fe) instead of PCI header provided - */ - pdev->class = 0x0c03fe; + u32 class = pdev->class; + + /* Use "USB Device (not host controller)" class */ + pdev->class = (PCI_CLASS_SERIAL_USB << 8) | 0xfe; + dev_info(&pdev->dev, "PCI class overridden (%#08x -> %#08x) so dwc3 driver can claim this instead of xhci\n", + class, pdev->class); } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB, quirk_amd_nl_class); -- 2.20.1