diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2015-06-19 15:28:31 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-07-14 13:38:26 -0500 |
| commit | cd76d10b78ab21a7adc4562e016213dd4891b6e5 (patch) | |
| tree | ee7d775604c21256cbd79defdebface1721c5048 /drivers/pci/quirks.c | |
| parent | 3657cebda5eb9dc1c4c6a0ea5b38bfef70aea50a (diff) | |
| download | lwn-cd76d10b78ab21a7adc4562e016213dd4891b6e5.tar.gz lwn-cd76d10b78ab21a7adc4562e016213dd4891b6e5.zip | |
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 <bhelgaas@google.com>
Acked-by: Huang Rui <ray.huang@amd.com>
CC: Jason Chang <jason.chang@amd.com>
CC: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 10 |
1 files 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); |