static int init_slot()

in eisa_enumerator.c [425:477]

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

static int init_slot(int slot, struct eeprom_eisa_slot_info *es)
{
	unsigned int id;
	
	char id_string[8];
	
	if (!(es->slot_info&HPEE_SLOT_INFO_NO_READID)) {
		/* try to read the id of the board in the slot */
		id = le32_to_cpu(inl(SLOT2PORT(slot)+EPI));
		
		if (0xffffffff == id) {
			/* Maybe we didn't expect a card to be here... */
			if (es->eisa_slot_id == 0xffffffff)
				return -1;
			
			/* this board is not here or it does not 
			 * support readid 
			 */
			printk(KERN_ERR "EISA slot %d a configured board was not detected (", 
			       slot);
			
			print_eisa_id(id_string, es->eisa_slot_id);
			printk(" expected %s)\n", id_string);
		
			return -1;	

		}
		if (es->eisa_slot_id != id) {
			print_eisa_id(id_string, id);
			printk(KERN_ERR "EISA slot %d id mis-match: got %s", 
			       slot, id_string);
			
			print_eisa_id(id_string, es->eisa_slot_id);
			printk(" expected %s\n", id_string);
		
			return -1;	
			
		}
	}
	
	/* now: we need to enable the board if 
	 * it supports enabling and run through
	 * the port init sction if present
	 * and finally record any interrupt polarity
	 */
	if (es->slot_features & HPEE_SLOT_FEATURES_ENABLE) {
		/* enable board */
		outb(0x01| inb(SLOT2PORT(slot)+EPI+4),
		     SLOT2PORT(slot)+EPI+4);
	}
	
	return 0;
}