powerpc/xics: Give a name to the default XICS IRQ domain

and clean up the error path.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-19-clg@kaod.org

diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index ed2bc14..18d3de2 100644 (file)
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -412,11 +412,22 @@ static const struct irq_domain_ops xics_host_ops = {
        .xlate = xics_host_xlate,
 };
 
-static void __init xics_init_host(void)
+static int __init xics_allocate_domain(void)
 {
-       xics_host = irq_domain_add_tree(NULL, &xics_host_ops, NULL);
-       BUG_ON(xics_host == NULL);
+       struct fwnode_handle *fn;
+
+       fn = irq_domain_alloc_named_fwnode("XICS");
+       if (!fn)
+               return -ENOMEM;
+
+       xics_host = irq_domain_create_tree(fn, &xics_host_ops, NULL);
+       if (!xics_host) {
+               irq_domain_free_fwnode(fn);
+               return -ENOMEM;
+       }
+
        irq_set_default_host(xics_host);
+       return 0;
 }
 
 void __init xics_register_ics(struct ics *ics)
@@ -480,6 +491,8 @@ void __init xics_init(void)
        /* Initialize common bits */
        xics_get_server_size();
        xics_update_irq_servers();
-       xics_init_host();
+       rc = xics_allocate_domain();
+       if (rc < 0)
+               pr_err("XICS: Failed to create IRQ domain");
        xics_setup_cpu();
 }