--- a/activate.c
+++ b/activate.c
@@ -103,7 +103,6 @@ error:
 	switch (errsave) {
 	case EAGAIN: /* Interrupted by signal. */
 	case EBUSY: /* Affinity change already in progress. */
-	case EINVAL: /* IRQ would be bound to no CPU. */
 	case ERANGE: /* CPU in mask is offline. */
 	case ENOMEM: /* Kernel cannot allocate CPU mask. */
 		/* Do not blacklist the IRQ on transient errors. */