int raw_pci_write()

in pci/pci.c [75:97]

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

int raw_pci_write(unsigned int seg, unsigned int bus, unsigned int devfn,
	       int reg, int len, u32 value)
{
	u64 addr;
	int mode, result;

	if ((seg > 65535) || (bus > 255) || (devfn > 255) || (reg > 4095))
		return -EINVAL;

	if ((seg | reg) <= 255) {
		addr = PCI_SAL_ADDRESS(seg, bus, devfn, reg);
		mode = 0;
	} else if (sal_revision >= SAL_VERSION_CODE(3,2)) {
		addr = PCI_SAL_EXT_ADDRESS(seg, bus, devfn, reg);
		mode = 1;
	} else {
		return -EINVAL;
	}
	result = ia64_sal_pci_config_write(addr, mode, len, value);
	if (result != 0)
		return -EINVAL;
	return 0;
}