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Commit cd76d10b authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

PCI: Use PCI_CLASS_SERIAL_USB instead of bare number 



be6646bf ("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: default avatarBjorn Helgaas <bhelgaas@google.com>
Acked-by: default avatarHuang Rui <ray.huang@amd.com>
CC: Jason Chang <jason.chang@amd.com>
CC: Felipe Balbi <balbi@ti.com>
parent 3657cebd

drivers/pci/quirks.c

+6 −4
Original line number Diff line number Diff line
@@ -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);