The following commit has been merged into the irq/core branch of tip:
Commit-ID: 1bf2c92829274e7c815d06d7b3196a967ff70917
Gitweb: https://git.kernel.org/tip/1bf2c92829274e7c815d06d7b3196a967ff70917
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Thu, 08 Aug 2024 22:19:41 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Fri, 09 Aug 2024 22:37:54 +02:00
irqdomain: Cleanup domain name allocation
irq_domain_set_name() is truly unreadable gunk. Clean it up before adding
more.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Link: https://lore.kernel.org/all/874j7uvkbm.ffs@tglx
---
kernel/irq/irqdomain.c | 106 ++++++++++++++++++++--------------------
1 file changed, 55 insertions(+), 51 deletions(-)
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 7625e42..72ab601 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -128,72 +128,76 @@ void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
}
EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
-static int irq_domain_set_name(struct irq_domain *domain,
- const struct fwnode_handle *fwnode,
- enum irq_domain_bus_token bus_token)
+static int alloc_name(struct irq_domain *domain, char *base, enum irq_domain_bus_token bus_token)
+{
+ domain->name = bus_token ? kasprintf(GFP_KERNEL, "%s-%d", base, bus_token) :
+ kasprintf(GFP_KERNEL, "%s", base);
+ if (!domain->name)
+ return -ENOMEM;
+
+ domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+ return 0;
+}
+
+static int alloc_fwnode_name(struct irq_domain *domain, const struct fwnode_handle *fwnode,
+ enum irq_domain_bus_token bus_token)
+{
+ char *name = bus_token ? kasprintf(GFP_KERNEL, "%pfw-%d", fwnode, bus_token) :
+ kasprintf(GFP_KERNEL, "%pfw", fwnode);
+
+ if (!name)
+ return -ENOMEM;
+
+ /*
+ * fwnode paths contain '/', which debugfs is legitimately unhappy
+ * about. Replace them with ':', which does the trick and is not as
+ * offensive as '\'...
+ */
+ domain->name = strreplace(name, '/', ':');
+ domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+ return 0;
+}
+
+static int alloc_unknown_name(struct irq_domain *domain, enum irq_domain_bus_token bus_token)
{
static atomic_t unknown_domains;
- struct irqchip_fwid *fwid;
+ int id = atomic_inc_return(&unknown_domains);
+
+ domain->name = bus_token ? kasprintf(GFP_KERNEL, "unknown-%d-%d", id, bus_token) :
+ kasprintf(GFP_KERNEL, "unknown-%d", id);
+ if (!domain->name)
+ return -ENOMEM;
+ domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+ return 0;
+}
+
+static int irq_domain_set_name(struct irq_domain *domain, const struct fwnode_handle *fwnode,
+ enum irq_domain_bus_token bus_token)
+{
if (is_fwnode_irqchip(fwnode)) {
- fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
+ struct irqchip_fwid *fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
switch (fwid->type) {
case IRQCHIP_FWNODE_NAMED:
case IRQCHIP_FWNODE_NAMED_ID:
- domain->name = bus_token ?
- kasprintf(GFP_KERNEL, "%s-%d",
- fwid->name, bus_token) :
- kstrdup(fwid->name, GFP_KERNEL);
- if (!domain->name)
- return -ENOMEM;
- domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
- break;
+ return alloc_name(domain, fwid->name, bus_token);
default:
domain->name = fwid->name;
- if (bus_token) {
- domain->name = kasprintf(GFP_KERNEL, "%s-%d",
- fwid->name, bus_token);
- if (!domain->name)
- return -ENOMEM;
- domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
- }
- break;
+ if (bus_token)
+ return alloc_name(domain, fwid->name, bus_token);
}
- } else if (is_of_node(fwnode) || is_acpi_device_node(fwnode) ||
- is_software_node(fwnode)) {
- char *name;
- /*
- * fwnode paths contain '/', which debugfs is legitimately
- * unhappy about. Replace them with ':', which does
- * the trick and is not as offensive as '\'...
- */
- name = bus_token ?
- kasprintf(GFP_KERNEL, "%pfw-%d", fwnode, bus_token) :
- kasprintf(GFP_KERNEL, "%pfw", fwnode);
- if (!name)
- return -ENOMEM;
-
- domain->name = strreplace(name, '/', ':');
- domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
+ } else if (is_of_node(fwnode) || is_acpi_device_node(fwnode) || is_software_node(fwnode)) {
+ return alloc_fwnode_name(domain, fwnode, bus_token);
}
- if (!domain->name) {
- if (fwnode)
- pr_err("Invalid fwnode type for irqdomain\n");
- domain->name = bus_token ?
- kasprintf(GFP_KERNEL, "unknown-%d-%d",
- atomic_inc_return(&unknown_domains),
- bus_token) :
- kasprintf(GFP_KERNEL, "unknown-%d",
- atomic_inc_return(&unknown_domains));
- if (!domain->name)
- return -ENOMEM;
- domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
- }
+ if (domain->name)
+ return 0;
- return 0;
+ if (fwnode)
+ pr_err("Invalid fwnode type for irqdomain\n");
+ return alloc_unknown_name(domain, bus_token);
}
static struct irq_domain *__irq_domain_create(const struct irq_domain_info *info)
|