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PCI: Use pci_find_vsec_capability() when looking for TBT devices

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Currently set_pcie_thunderbolt() open-codes pci_find_vsec_capability().
Refactor the former to use the latter. No functional change intended.

Link: https://lore.kernel.org/r/20211115112902.24033-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
This commit is contained in:
Andy Shevchenko 2021-11-15 13:29:02 +02:00 • committed by Bjorn Helgaas
parent fa55b7dcdc
commit d2c64f98c3
1 changed files with 5 additions and 13 deletions
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18
drivers/pci/probe.c
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@ -1579,20 +1579,12 @@ void set_pcie_hotplug_bridge(struct pci_dev *pdev)
static void set_pcie_thunderbolt(struct pci_dev *dev) static void set_pcie_thunderbolt(struct pci_dev *dev)
{ {
int vsec = 0; u16 vsec;
u32 header;
while ((vsec = pci_find_next_ext_capability(dev, vsec, /* Is the device part of a Thunderbolt controller? */
PCI_EXT_CAP_ID_VNDR))) { vsec = pci_find_vsec_capability(dev, PCI_VENDOR_ID_INTEL, PCI_VSEC_ID_INTEL_TBT);
pci_read_config_dword(dev, vsec + PCI_VNDR_HEADER, &header); if (vsec)
dev->is_thunderbolt = 1;
/* Is the device part of a Thunderbolt controller? */
if (dev->vendor == PCI_VENDOR_ID_INTEL &&
PCI_VNDR_HEADER_ID(header) == PCI_VSEC_ID_INTEL_TBT) {
dev->is_thunderbolt = 1;
return;
}
}
} }
static void set_pcie_untrusted(struct pci_dev *dev) static void set_pcie_untrusted(struct pci_dev *dev)