static int fake_master_set()

in bridges/vme_fake.c [251:333]

• 66 lines of code
• 17 McCabe index (conditional complexity)

static int fake_master_set(struct vme_master_resource *image, int enabled,
		unsigned long long vme_base, unsigned long long size,
		u32 aspace, u32 cycle, u32 dwidth)
{
	int retval = 0;
	unsigned int i;
	struct vme_bridge *fake_bridge;
	struct fake_driver *bridge;

	fake_bridge = image->parent;

	bridge = fake_bridge->driver_priv;

	/* Verify input data */
	if (vme_base & 0xFFFF) {
		pr_err("Invalid VME Window alignment\n");
		retval = -EINVAL;
		goto err_window;
	}

	if (size & 0xFFFF) {
		pr_err("Invalid size alignment\n");
		retval = -EINVAL;
		goto err_window;
	}

	if ((size == 0) && (enabled != 0)) {
		pr_err("Size must be non-zero for enabled windows\n");
		retval = -EINVAL;
		goto err_window;
	}

	/* Setup data width */
	switch (dwidth) {
	case VME_D8:
	case VME_D16:
	case VME_D32:
		break;
	default:
		pr_err("Invalid data width\n");
		retval = -EINVAL;
		goto err_dwidth;
	}

	/* Setup address space */
	switch (aspace) {
	case VME_A16:
	case VME_A24:
	case VME_A32:
	case VME_A64:
	case VME_CRCSR:
	case VME_USER1:
	case VME_USER2:
	case VME_USER3:
	case VME_USER4:
		break;
	default:
		pr_err("Invalid address space\n");
		retval = -EINVAL;
		goto err_aspace;
	}

	spin_lock(&image->lock);

	i = image->number;

	bridge->masters[i].enabled = enabled;
	bridge->masters[i].vme_base = vme_base;
	bridge->masters[i].size = size;
	bridge->masters[i].aspace = aspace;
	bridge->masters[i].cycle = cycle;
	bridge->masters[i].dwidth = dwidth;

	spin_unlock(&image->lock);

	return 0;

err_aspace:
err_dwidth:
err_window:
	return retval;

}