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firewire: core: add helper functions to convert to parent resource structure

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All of local resource structure commonly have data of client_resource type
in its first member. This design sometimes requires usage of
container_of to retrieve parent structure by the first member.

This commit adds some helper functions for this purpose.

Link: https://lore.kernel.org/r/20240812235210.28458-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto
2024-08-13 08:52:07 +09:00
parent 3b443fe087
commit ced2da31b8
1 changed files with 26 additions and 12 deletions
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38
drivers/firewire/core-cdev.c
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@@ -139,6 +139,26 @@ struct iso_resource {
struct iso_resource_event *e_alloc, *e_dealloc;
};
static struct address_handler_resource *to_address_handler_resource(struct client_resource *resource)
{
return container_of(resource, struct address_handler_resource, resource);
}
static struct inbound_transaction_resource *to_inbound_transaction_resource(struct client_resource *resource)
{
return container_of(resource, struct inbound_transaction_resource, resource);
}
static struct descriptor_resource *to_descriptor_resource(struct client_resource *resource)
{
return container_of(resource, struct descriptor_resource, resource);
}
static struct iso_resource *to_iso_resource(struct client_resource *resource)
{
return container_of(resource, struct iso_resource, resource);
}
static void release_iso_resource(struct client *, struct client_resource *);
static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
@@ -151,8 +171,7 @@ static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
static void schedule_if_iso_resource(struct client_resource *resource)
{
if (resource->release == release_iso_resource)
schedule_iso_resource(container_of(resource,
struct iso_resource, resource), 0);
schedule_iso_resource(to_iso_resource(resource), 0);
}
/*
@@ -682,8 +701,7 @@ static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
static void release_request(struct client *client,
struct client_resource *resource)
{
struct inbound_transaction_resource *r = container_of(resource,
struct inbound_transaction_resource, resource);
struct inbound_transaction_resource *r = to_inbound_transaction_resource(resource);
if (r->is_fcp)
fw_request_put(r->request);
@@ -793,8 +811,7 @@ static void handle_request(struct fw_card *card, struct fw_request *request,
static void release_address_handler(struct client *client,
struct client_resource *resource)
{
struct address_handler_resource *r =
container_of(resource, struct address_handler_resource, resource);
struct address_handler_resource *r = to_address_handler_resource(resource);
fw_core_remove_address_handler(&r->handler);
kfree(r);
@@ -858,8 +875,7 @@ static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
release_request, &resource) < 0)
return -EINVAL;
r = container_of(resource, struct inbound_transaction_resource,
resource);
r = to_inbound_transaction_resource(resource);
if (r->is_fcp) {
fw_request_put(r->request);
goto out;
@@ -893,8 +909,7 @@ static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
static void release_descriptor(struct client *client,
struct client_resource *resource)
{
struct descriptor_resource *r =
container_of(resource, struct descriptor_resource, resource);
struct descriptor_resource *r = to_descriptor_resource(resource);
fw_core_remove_descriptor(&r->descriptor);
kfree(r);
@@ -1387,8 +1402,7 @@ static void iso_resource_work(struct work_struct *work)
static void release_iso_resource(struct client *client,
struct client_resource *resource)
{
struct iso_resource *r =
container_of(resource, struct iso_resource, resource);
struct iso_resource *r = to_iso_resource(resource);
guard(spinlock_irq)(&client->lock);