static inline void alloc_resource()

in pci/pci-common.c [738:764]

• 24 lines of code
• 5 McCabe index (conditional complexity)

static inline void alloc_resource(struct pci_dev *dev, int idx)
{
	struct resource *pr, *r = &dev->resource[idx];

	pr_debug("PCI: Allocating %s: Resource %d: %016llx..%016llx [%x]\n",
		 pci_name(dev), idx,
		 (unsigned long long)r->start,
		 (unsigned long long)r->end,
		 (unsigned int)r->flags);

	pr = pci_find_parent_resource(dev, r);
	if (!pr || (pr->flags & IORESOURCE_UNSET) ||
	    request_resource(pr, r) < 0) {
		pr_warn("PCI: Cannot allocate resource region %d ", idx);
		pr_cont("of device %s, will remap\n", pci_name(dev));
		if (pr)
			pr_debug("PCI:  parent is %p: %016llx-%016llx [%x]\n",
				 pr,
				 (unsigned long long)pr->start,
				 (unsigned long long)pr->end,
				 (unsigned int)pr->flags);
		/* We'll assign a new address later */
		r->flags |= IORESOURCE_UNSET;
		r->end -= r->start;
		r->start = 0;
	}
}