static unsigned int new_space()

in pci/pci.c [124:149]

• 21 lines of code
• 6 McCabe index (conditional complexity)

static unsigned int new_space(u64 phys_base, int sparse)
{
	u64 mmio_base;
	int i;

	if (phys_base == 0)
		return 0;	/* legacy I/O port space */

	mmio_base = (u64) ioremap(phys_base, 0);
	for (i = 0; i < num_io_spaces; i++)
		if (io_space[i].mmio_base == mmio_base &&
		    io_space[i].sparse == sparse)
			return i;

	if (num_io_spaces == MAX_IO_SPACES) {
		pr_err("PCI: Too many IO port spaces "
			"(MAX_IO_SPACES=%lu)\n", MAX_IO_SPACES);
		return ~0;
	}

	i = num_io_spaces++;
	io_space[i].mmio_base = mmio_base;
	io_space[i].sparse = sparse;

	return i;
}