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Subject[PATCH v4 4/6] irqdomain: set irq domain flags before the irq domain becomes visible
Date
irq_domain_create_hierarchy() sets additional flags after the domain
is successfully allocated, but the domain becomes visible when it is
added to irq_domain_list. When a consumer gets the domain, the flags
may not have been set yet.

Move "domain->flags |= flags;" into __irq_domain_add().

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

Changes in v4:
- Newly added


include/linux/irqdomain.h | 13 +++++++------
kernel/irq/irqdomain.c | 19 +++++++++----------
2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 31be32d..7609807 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -237,7 +237,8 @@ static inline struct fwnode_handle *irq_domain_alloc_fwnode(void *data)
}

void irq_domain_free_fwnode(struct fwnode_handle *fwnode);
-struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
+struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode,
+ unsigned int flags, int size,
irq_hw_number_t hwirq_max, int direct_max,
const struct irq_domain_ops *ops,
void *host_data);
@@ -309,14 +310,14 @@ static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_no
const struct irq_domain_ops *ops,
void *host_data)
{
- return __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
+ return __irq_domain_add(of_node_to_fwnode(of_node), 0, size, size, 0, ops, host_data);
}
static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
unsigned int max_irq,
const struct irq_domain_ops *ops,
void *host_data)
{
- return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data);
+ return __irq_domain_add(of_node_to_fwnode(of_node), 0, 0, max_irq, max_irq, ops, host_data);
}
static inline struct irq_domain *irq_domain_add_legacy_isa(
struct device_node *of_node,
@@ -330,7 +331,7 @@ static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node
const struct irq_domain_ops *ops,
void *host_data)
{
- return __irq_domain_add(of_node_to_fwnode(of_node), 0, ~0, 0, ops, host_data);
+ return __irq_domain_add(of_node_to_fwnode(of_node), 0, 0, ~0, 0, ops, host_data);
}

static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode,
@@ -338,14 +339,14 @@ static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *
const struct irq_domain_ops *ops,
void *host_data)
{
- return __irq_domain_add(fwnode, size, size, 0, ops, host_data);
+ return __irq_domain_add(fwnode, 0, size, size, 0, ops, host_data);
}

static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode,
const struct irq_domain_ops *ops,
void *host_data)
{
- return __irq_domain_add(fwnode, 0, ~0, 0, ops, host_data);
+ return __irq_domain_add(fwnode, 0, 0, ~0, 0, ops, host_data);
}

extern void irq_domain_remove(struct irq_domain *host);
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 18d11b9..b317a64 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -115,6 +115,7 @@ EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
/**
* __irq_domain_add() - Allocate a new irq_domain data structure
* @fwnode: firmware node for the interrupt controller
+ * @flags: Irq domain flags associated to the domain
* @size: Size of linear map; 0 for radix mapping only
* @hwirq_max: Maximum number of interrupts supported by controller
* @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no
@@ -125,7 +126,8 @@ EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
* Allocates and initialize and irq_domain structure.
* Returns pointer to IRQ domain, or NULL on failure.
*/
-struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
+struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode,
+ unsigned int flags, int size,
irq_hw_number_t hwirq_max, int direct_max,
const struct irq_domain_ops *ops,
void *host_data)
@@ -213,6 +215,7 @@ struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
domain->ops = ops;
domain->host_data = host_data;
+ domain->flags |= flags;
domain->hwirq_max = hwirq_max;
domain->revmap_size = size;
domain->revmap_direct_max_irq = direct_max;
@@ -319,7 +322,7 @@ struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
{
struct irq_domain *domain;

- domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
+ domain = __irq_domain_add(of_node_to_fwnode(of_node), 0, size, size, 0, ops, host_data);
if (!domain)
return NULL;

@@ -363,7 +366,7 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
{
struct irq_domain *domain;

- domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size,
+ domain = __irq_domain_add(of_node_to_fwnode(of_node), 0, first_hwirq + size,
first_hwirq + size, 0, ops, host_data);
if (domain)
irq_domain_associate_many(domain, first_irq, first_hwirq, size);
@@ -1133,14 +1136,10 @@ struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
{
struct irq_domain *domain;

- if (size)
- domain = irq_domain_create_linear(fwnode, size, ops, host_data);
- else
- domain = irq_domain_create_tree(fwnode, ops, host_data);
- if (domain) {
+ domain = __irq_domain_add(fwnode, flags, size, size ? size : ~0, 0,
+ ops, host_data);
+ if (domain)
domain->parent = parent;
- domain->flags |= flags;
- }

return domain;
}
--
2.7.4
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