xen: events: do not free legacy IRQs
c514d00c8057 "xen: events: add xen_allocate_irq_{dynamic, gsi} and
xen_free_irq" correctly avoids reallocating legacy IRQs (which are
managed by the arch core) but erroneously did not prevent them being
freed.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 06f2e61..accb37a 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -434,6 +434,10 @@
static void xen_free_irq(unsigned irq)
{
+ /* Legacy IRQ descriptors are managed by the arch. */
+ if (irq < NR_IRQS_LEGACY)
+ return;
+
irq_free_desc(irq);
}