On Maw, 2004-08-17 at 14:12, Bartlomiej Zolnierkiewicz wrote:

quoted

+			if (g->irq == hwif->irq)
+				++irq_count;
+			g = g->next;
+		} while (g != hwgroup->hwif);
+	}
+	spin_unlock_irq(&ide_lock);

new race(s) here because of not holding ide_cfg_sem anylonger,
see init_irq() in ide-probe.c and ide_cfg_sem comments in ide.h

Double checked. No race. ide_cfg_sem is held over the whole 
ide_unregister path.