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ACPI / hotplug / PCI: Embed function struct into struct acpiphp_context

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Since there has to be a struct acpiphp_func object for every struct
acpiphp_context created by register_slot(), the struct acpiphp_func
one can be embedded into the struct acpiphp_context one, which allows
some code simplifications to be made.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2013-07-13 23:27:25 +02:00
parent 75a33ed1b5
commit bd4674dfc5
2 changed files with 22 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/pci/hotplug/acpiphp.h
View File

@ -116,7 +116,6 @@ struct acpiphp_slot {
* typically 8 objects per slot (i.e. for each PCI function)
*/
struct acpiphp_func {
struct acpiphp_context *context;
struct acpiphp_slot *slot; /* parent */
struct list_head sibling;
@ -128,11 +127,16 @@ struct acpiphp_func {
struct acpiphp_context {
acpi_handle handle;
struct acpiphp_func *func;
struct acpiphp_func func;
struct acpiphp_bridge *bridge;
unsigned int refcount;
};
static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
{
return container_of(func, struct acpiphp_context, func);
}
/*
* struct acpiphp_attention_info - device specific attention registration
*

44
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -128,7 +128,7 @@ static void acpiphp_put_context(struct acpiphp_context *context)
if (--context->refcount)
return;
WARN_ON(context->func || context->bridge);
WARN_ON(context->bridge);
acpi_detach_data(context->handle, acpiphp_context_handler);
kfree(context);
}
@ -155,12 +155,9 @@ static void free_bridge(struct kref *kref)
bridge = container_of(kref, struct acpiphp_bridge, ref);
list_for_each_entry_safe(slot, next, &bridge->slots, node) {
list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) {
context = func->context;
context->func = NULL;
acpiphp_put_context(context);
kfree(func);
}
list_for_each_entry_safe(func, tmp, &slot->funcs, sibling)
acpiphp_put_context(func_to_context(func));
kfree(slot);
}
@ -168,7 +165,7 @@ static void free_bridge(struct kref *kref)
/* Root bridges will not have hotplug context. */
if (context) {
/* Release the reference taken by acpiphp_enumerate_slots(). */
put_bridge(context->func->slot->bridge);
put_bridge(context->func.slot->bridge);
context->bridge = NULL;
acpiphp_put_context(context);
}
@ -190,7 +187,7 @@ static void free_bridge(struct kref *kref)
static void post_dock_fixups(acpi_handle not_used, u32 event, void *data)
{
struct acpiphp_context *context = data;
struct pci_bus *bus = context->func->slot->bridge->pci_bus;
struct pci_bus *bus = context->func.slot->bridge->pci_bus;
u32 buses;
if (!bus->self)
@ -251,14 +248,14 @@ static void acpiphp_dock_init(void *data)
{
struct acpiphp_context *context = data;
get_bridge(context->func->slot->bridge);
get_bridge(context->func.slot->bridge);
}
static void acpiphp_dock_release(void *data)
{
struct acpiphp_context *context = data;
put_bridge(context->func->slot->bridge);
put_bridge(context->func.slot->bridge);
}
/* callback routine to register each ACPI PCI slot object */
@ -288,23 +285,16 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
device = (adr >> 16) & 0xffff;
function = adr & 0xffff;
newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
if (!newfunc)
return AE_NO_MEMORY;
newfunc->handle = handle;
newfunc->function = function;
mutex_lock(&acpiphp_context_lock);
context = acpiphp_init_context(handle);
if (!context) {
mutex_unlock(&acpiphp_context_lock);
acpi_handle_err(handle, "No hotplug context\n");
kfree(newfunc);
return AE_NOT_EXIST;
}
newfunc->context = context;
context->func = newfunc;
newfunc = &context->func;
newfunc->handle = handle;
newfunc->function = function;
mutex_unlock(&acpiphp_context_lock);
if (acpi_has_method(handle, "_EJ0"))
@ -404,10 +394,8 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
err:
mutex_lock(&acpiphp_context_lock);
context->func = NULL;
acpiphp_put_context(context);
mutex_unlock(&acpiphp_context_lock);
kfree(newfunc);
return status;
}
@ -938,7 +926,7 @@ void acpiphp_check_host_bridge(acpi_handle handle)
static void hotplug_event(acpi_handle handle, u32 type, void *data)
{
struct acpiphp_context *context = data;
struct acpiphp_func *func = context->func;
struct acpiphp_func *func = &context->func;
struct acpiphp_bridge *bridge;
char objname[64];
struct acpi_buffer buffer = { .length = sizeof(objname),
@ -1029,7 +1017,7 @@ static void hotplug_event_work(struct work_struct *work)
acpi_scan_lock_release();
kfree(hp_work); /* allocated in handle_hotplug_event() */
put_bridge(context->func->slot->bridge);
put_bridge(context->func.slot->bridge);
}
/**
@ -1047,7 +1035,7 @@ static void handle_hotplug_event(acpi_handle handle, u32 type, void *data)
mutex_lock(&acpiphp_context_lock);
context = acpiphp_get_context(handle);
if (context) {
get_bridge(context->func->slot->bridge);
get_bridge(context->func.slot->bridge);
acpiphp_put_context(context);
}
mutex_unlock(&acpiphp_context_lock);
@ -1109,7 +1097,7 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
*/
mutex_lock(&acpiphp_context_lock);
context = acpiphp_get_context(handle);
if (WARN_ON(!context || !context->func)) {
if (WARN_ON(!context)) {
mutex_unlock(&acpiphp_context_lock);
put_device(&bus->dev);
kfree(bridge);
@ -1118,7 +1106,7 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
bridge->context = context;
context->bridge = bridge;
/* Get a reference to the parent bridge. */
get_bridge(context->func->slot->bridge);
get_bridge(context->func.slot->bridge);
mutex_unlock(&acpiphp_context_lock);
}