static void __init nubus_probe_slot()

in nubus.c [829:858]

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

static void __init nubus_probe_slot(int slot)
{
	unsigned char dp;
	unsigned char *rp;
	int i;

	rp = nubus_rom_addr(slot);
	for (i = 4; i; i--) {
		rp--;
		if (!hwreg_present(rp))
			continue;

		dp = *rp;

		/* The last byte of the format block consists of two
		   nybbles which are "mirror images" of each other.
		   These show us the valid bytelanes */
		if ((((dp >> 4) ^ dp) & 0x0F) != 0x0F)
			continue;
		/* Check that this value is actually *on* one of the
		   bytelanes it claims are valid! */
		if (not_useful(rp, dp))
			continue;

		/* Looks promising.  Let's put it on the list. */
		nubus_add_board(slot, dp);

		return;
	}
}