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PCI: Add for_each_pci_bridge() helper

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The following pattern is often used:

  list_for_each_entry(dev, &bus->devices, bus_list) {
    if (pci_is_bridge(dev)) {
      ...
    }
  }

Add a for_each_pci_bridge() helper to make that code easier to write and
read by reducing indentation level.  It also saves one or few lines of code
in each occurrence.

Convert PCI core parts here at the same time.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[bhelgaas: fold in http://lkml.kernel.org/r/20171013165352.25550-1-andriy.shevchenko@linux.intel.com]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Andy Shevchenko
2017-10-20 15:38:54 -05:00
committed by Bjorn Helgaas
parent 3691314a90
commit 24a0c654d7
8 changed files with 23 additions and 32 deletions
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4
include/linux/pci.h
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@@ -596,6 +596,10 @@ static inline bool pci_is_bridge(struct pci_dev *dev)
dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
}
#define for_each_pci_bridge(dev, bus) \
list_for_each_entry(dev, &bus->devices, bus_list) \
if (!pci_is_bridge(dev)) {} else
static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
{
dev = pci_physfn(dev);