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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-04-04 18:45:25 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2023-04-05 23:10:09 +0300 |
| commit | 02992064bdffc97403b6058491094cd41d1a11ef (patch) | |
| tree | 6aa20b8e594b33ee6627b973c0b44ac290591d68 /include/linux/pci.h | |
| parent | ceb928be5cab32043f230bcb1adeb0a9a9b8f0f2 (diff) | |
| download | linux-02992064bdffc97403b6058491094cd41d1a11ef.tar.xz | |
PCI: Make pci_bus_for_each_resource() index optional
Refactor pci_bus_for_each_resource() in the same way as
pci_dev_for_each_resource(). This allows the index to be hidden inside the
implementation so the caller can omit it when it's not used otherwise.
No functional changes intended.
Link: https://lore.kernel.org/r/20230330162434.35055-6-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>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index db3155562320..c048e70d42b9 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1444,11 +1444,21 @@ int devm_request_pci_bus_resources(struct device *dev, /* Temporary until new and working PCI SBR API in place */ int pci_bridge_secondary_bus_reset(struct pci_dev *dev); +#define __pci_bus_for_each_res0(bus, res, ...) \ + for (unsigned int __b = 0; \ + (res = pci_bus_resource_n(bus, __b)) || __b < PCI_BRIDGE_RESOURCE_NUM; \ + __b++) + +#define __pci_bus_for_each_res1(bus, res, __b) \ + for (__b = 0; \ + (res = pci_bus_resource_n(bus, __b)) || __b < PCI_BRIDGE_RESOURCE_NUM; \ + __b++) + /** * pci_bus_for_each_resource - iterate over PCI bus resources * @bus: the PCI bus * @res: pointer to the current resource - * @i: index of the current resource + * @...: optional index of the current resource * * Iterate over PCI bus resources. The first part is to go over PCI bus * resource array, which has at most the %PCI_BRIDGE_RESOURCE_NUM entries. @@ -1461,13 +1471,17 @@ int pci_bridge_secondary_bus_reset(struct pci_dev *dev); * struct resource *res; * unsigned int i; * + * // With optional index * pci_bus_for_each_resource(bus, res, i) * pr_info("PCI bus resource[%u]: %pR\n", i, res); + * + * // Without index + * pci_bus_for_each_resource(bus, res) + * _do_something_(res); */ -#define pci_bus_for_each_resource(bus, res, i) \ - for (i = 0; \ - (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \ - i++) +#define pci_bus_for_each_resource(bus, res, ...) \ + CONCATENATE(__pci_bus_for_each_res, COUNT_ARGS(__VA_ARGS__)) \ + (bus, res, __VA_ARGS__) int __must_check pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t size, |