50 static void hotplug_event(u32 type, struct acpiphp_context *context);
54  * acpiphp_init_context - Create hotplug context and grab a reference to it.
55  * @adev: ACPI device object to create the context for.
61 	struct acpiphp_context *context;  in acpiphp_init_context()  local
63 	context = kzalloc(sizeof(*context), GFP_KERNEL);  in acpiphp_init_context()
64 	if (!context)  in acpiphp_init_context()
67 	context->refcount = 1;  in acpiphp_init_context()
68 	context->hp.notify = acpiphp_hotplug_notify;  in acpiphp_init_context()
69 	context->hp.fixup = acpiphp_post_dock_fixup;  in acpiphp_init_context()
70 	acpi_set_hp_context(adev, &context->hp);  in acpiphp_init_context()
71 	return context;  in acpiphp_init_context()
75  * acpiphp_get_context - Get hotplug context and grab a reference to it.
76  * @adev: ACPI device object to get the context for.
82 	struct acpiphp_context *context;  in acpiphp_get_context()  local
87 	context = to_acpiphp_context(adev->hp);  in acpiphp_get_context()
88 	context->refcount++;  in acpiphp_get_context()
89 	return context;  in acpiphp_get_context()
93  * acpiphp_put_context - Drop a reference to ACPI hotplug context.
94  * @context: ACPI hotplug context to drop a reference to.
96  * The context object is removed if there are no more references to it.
100 static void acpiphp_put_context(struct acpiphp_context *context)  in acpiphp_put_context()  argument
102 	if (--context->refcount)  in acpiphp_put_context()
105 	WARN_ON(context->bridge);  in acpiphp_put_context()
106 	context->hp.self->hp = NULL;  in acpiphp_put_context()
107 	kfree(context);  in acpiphp_put_context()
122 	struct acpiphp_context *context;  in acpiphp_grab_context()  local
126 	context = acpiphp_get_context(adev);  in acpiphp_grab_context()
127 	if (!context)  in acpiphp_grab_context()
130 	if (context->func.parent->is_going_away) {  in acpiphp_grab_context()
131 		acpiphp_put_context(context);  in acpiphp_grab_context()
132 		context = NULL;  in acpiphp_grab_context()
136 	get_bridge(context->func.parent);  in acpiphp_grab_context()
137 	acpiphp_put_context(context);  in acpiphp_grab_context()
141 	return context;  in acpiphp_grab_context()
144 static void acpiphp_let_context_go(struct acpiphp_context *context)  in acpiphp_let_context_go()  argument
146 	put_bridge(context->func.parent);  in acpiphp_let_context_go()
151 	struct acpiphp_context *context;  in free_bridge()  local
167 	context = bridge->context;  in free_bridge()
168 	/* Root bridges will not have hotplug context. */  in free_bridge()
169 	if (context) {  in free_bridge()
171 		put_bridge(context->func.parent);  in free_bridge()
172 		context->bridge = NULL;  in free_bridge()
173 		acpiphp_put_context(context);  in free_bridge()
191 	struct acpiphp_context *context = acpiphp_grab_context(adev);  in acpiphp_post_dock_fixup()  local
195 	if (!context)  in acpiphp_post_dock_fixup()
198 	bus = context->func.slot->bus;  in acpiphp_post_dock_fixup()
216 	acpiphp_let_context_go(context);  in acpiphp_post_dock_fixup()
220  * acpiphp_add_context - Add ACPIPHP context to an ACPI device object.
221  * @handle: ACPI handle of the object to add a context to.
230 	struct acpiphp_context *context;  in acpiphp_add_context()  local
255 	context = acpiphp_init_context(adev);  in acpiphp_add_context()
256 	if (!context) {  in acpiphp_add_context()
258 		acpi_handle_err(handle, "No hotplug context\n");  in acpiphp_add_context()
261 	newfunc = &context->func;  in acpiphp_add_context()
284 		acpiphp_put_context(context);  in acpiphp_add_context()
773 static void hotplug_event(u32 type, struct acpiphp_context *context)  in hotplug_event()  argument
775 	acpi_handle handle = context->hp.self->handle;  in hotplug_event()
776 	struct acpiphp_func *func = &context->func;  in hotplug_event()
781 	bridge = context->bridge;  in hotplug_event()
829 	struct acpiphp_context *context;  in acpiphp_hotplug_notify()  local
831 	context = acpiphp_grab_context(adev);  in acpiphp_hotplug_notify()
832 	if (!context)  in acpiphp_hotplug_notify()
835 	hotplug_event(type, context);  in acpiphp_hotplug_notify()
836 	acpiphp_let_context_go(context);  in acpiphp_hotplug_notify()
889 		struct acpiphp_context *context;  in acpiphp_enumerate_slots()  local
893 		 * under its parent, so the context should be there, unless the  in acpiphp_enumerate_slots()
897 		context = acpiphp_get_context(adev);  in acpiphp_enumerate_slots()
898 		if (!context)  in acpiphp_enumerate_slots()
901 		bridge->context = context;  in acpiphp_enumerate_slots()
902 		context->bridge = bridge;  in acpiphp_enumerate_slots()
904 		get_bridge(context->func.parent);  in acpiphp_enumerate_slots()