powerpc/powernv: Free name on error in opal_event_init()

In opal_event_init() if request_irq() fails name is not freed, leading
to a memory leak. The code only runs at boot time, there's no way for a
user to trigger it, so there's no security impact.

Fix the leak by freeing name in the error path.

Reported-by: 2639161967 <[email protected]>
Closes: https://lore.kernel.org/linuxppc-dev/[email protected]
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://patch.msgid.link/[email protected]

arch/powerpc/platforms/powernv/opal-irqchip.c

@@ -282,6 +282,7 @@ int __init opal_event_init(void)
 				 name, NULL);
 		if (rc) {
 			pr_warn("Error %d requesting OPAL irq %d\n", rc, (int)r->start);
+			kfree(name);
 			continue;
 		}
 	}