[PATCH v3 27/35] x86/hpet: Use irq_find_matching_fwspec() to find remapping irqdomain

[David Woodhouse]

From: David Woodhouse <d...@amazon.co.uk>

All possible parent domains have a select method now. Make use of it.

Signed-off-by: David Woodhouse <d...@amazon.co.uk>
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
---
 arch/x86/kernel/hpet.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 3b8b12769f3b..08651a4e6aa0 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -543,8 +543,8 @@ static struct irq_domain *hpet_create_irq_domain(int 
hpet_id)
 {
        struct msi_domain_info *domain_info;
        struct irq_domain *parent, *d;
-       struct irq_alloc_info info;
        struct fwnode_handle *fn;
+       struct irq_fwspec fwspec;
 
        if (x86_vector_domain == NULL)
                return NULL;
@@ -556,15 +556,6 @@ static struct irq_domain *hpet_create_irq_domain(int 
hpet_id)
        *domain_info = hpet_msi_domain_info;
        domain_info->data = (void *)(long)hpet_id;
 
-       init_irq_alloc_info(&info, NULL);
-       info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
-       info.devid = hpet_id;
-       parent = irq_remapping_get_irq_domain(&info);
-       if (parent == NULL)
-               parent = x86_vector_domain;
-       else
-               hpet_msi_controller.name = "IR-HPET-MSI";
-
        fn = irq_domain_alloc_named_id_fwnode(hpet_msi_controller.name,
                                              hpet_id);
        if (!fn) {
@@ -572,6 +563,19 @@ static struct irq_domain *hpet_create_irq_domain(int 
hpet_id)
                return NULL;
        }
 
+       fwspec.fwnode = fn;
+       fwspec.param_count = 1;
+       fwspec.param[0] = hpet_id;
+
+       parent = irq_find_matching_fwspec(&fwspec, DOMAIN_BUS_ANY);
+       if (!parent) {
+               irq_domain_free_fwnode(fn);
+               kfree(domain_info);
+               return NULL;
+       }
+       if (parent != x86_vector_domain)
+               hpet_msi_controller.name = "IR-HPET-MSI";
+
        d = msi_create_irq_domain(fn, domain_info, parent);
        if (!d) {
                irq_domain_free_fwnode(fn);
-- 
2.26.2