When stopping a core cpu_gic_callback is called in non-alloc
context, which causes xfree in release_irq to fail an assert.

To fix this, switch to a statically allocated irqaction that does not
need to be freed in release_irq.

Signed-off-by: Mykyta Poturai <mykyta_poturai@epam.com>

v1->v2:
* use percpu actions
---
 xen/arch/arm/gic.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index 260ee64cca..ed6853bb32 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -386,10 +386,17 @@ void gic_dump_info(struct vcpu *v)
     gic_hw_ops->dump_state(v);
 }
 
+DEFINE_PER_CPU_READ_MOSTLY(struct irqaction, irq_maintenance);
+
 void init_maintenance_interrupt(void)
 {
-    request_irq(gic_hw_ops->info->maintenance_irq, 0, maintenance_interrupt,
-                "irq-maintenance", NULL);
+    struct irqaction *maintenance = &this_cpu(irq_maintenance);
+
+    maintenance->name = "irq-maintenance";
+    maintenance->handler = maintenance_interrupt;
+    maintenance->dev_id = NULL;
+    maintenance->free_on_release = 0;
+    setup_irq(gic_hw_ops->info->maintenance_irq, 0, maintenance);
 }
 
 int gic_make_hwdom_dt_node(const struct domain *d,
-- 
2.34.1