irqchip/gic-v4: Clear IRQ_DISABLE_UNLAZY again if mapping fails

Should the call to irq_set_vcpu_affinity() fail at map time,
we should restore the normal lazy-disable behaviour instead
of staying with the eager disable that GICv4 requires.
Reported-by: NEric Auger <eric.auger@redhat.com>
Acked-by: NChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

drivers/irqchip/irq-gic-v4.c

@@ -177,6 +177,7 @@ int its_map_vlpi(int irq, struct its_vlpi_map *map)
 			.map      = map,
 		},
 	};
+	int ret;
 
 	/*
 	 * The host will never see that interrupt firing again, so it
@@ -184,7 +185,11 @@ int its_map_vlpi(int irq, struct its_vlpi_map *map)
 	 */
 	irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY);
 
-	return irq_set_vcpu_affinity(irq, &info);
+	ret = irq_set_vcpu_affinity(irq, &info);
+	if (ret)
+		irq_clear_status_flags(irq, IRQ_DISABLE_UNLAZY);
+
+	return ret;
 }
 
 int its_get_vlpi(int irq, struct its_vlpi_map *map)