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Commit abe5430e authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'acpi-pci-hotplug' 

* acpi-pci-hotplug: (34 commits)
  ACPI / PM: Hold acpi_scan_lock over system PM transitions
  ACPI / hotplug / PCI: Fix NULL pointer dereference in cleanup_bridge()
  PCI / ACPI: Use dev_dbg() instead of dev_info() in acpi_pci_set_power_state()
  ACPI / hotplug / PCI: Get rid of check_sub_bridges()
  ACPI / hotplug / PCI: Clean up bridge_mutex usage
  ACPI / hotplug / PCI: Redefine enable_device() and disable_device()
  ACPI / hotplug / PCI: Sanitize acpiphp_get_(latch)|(adapter)_status()
  ACPI / hotplug / PCI: Get rid of unused constants in acpiphp.h
  ACPI / hotplug / PCI: Check for new devices on enabled slots
  ACPI / hotplug / PCI: Allow slots without new devices to be rescanned
  ACPI / hotplug / PCI: Do not check SLOT_ENABLED in enable_device()
  ACPI / hotplug / PCI: Do not exectute _PS0 and _PS3 directly
  ACPI / hotplug / PCI: Do not queue up event handling work items in vain
  ACPI / hotplug / PCI: Consolidate slot disabling and ejecting
  ACPI / hotplug / PCI: Drop redundant checks from check_hotplug_bridge()
  ACPI / hotplug / PCI: Rework namespace scanning and trimming routines
  ACPI / hotplug / PCI: Store parent in functions and bus in slots
  ACPI / hotplug / PCI: Drop handle field from struct acpiphp_bridge
  ACPI / hotplug / PCI: Drop handle field from struct acpiphp_func
  ACPI / hotplug / PCI: Embed function struct into struct acpiphp_context
  ...
parents c92f56cb ad07277e

arch/x86/pci/i386.c

+4 −0
Original line number Diff line number Diff line
@@ -210,6 +210,8 @@ static void pcibios_allocate_bridge_resources(struct pci_dev *dev) 
		r = &dev->resource[idx];

		if (!r->flags)

			continue;

		if (r->parent)	/* Already allocated */

			continue;

		if (!r->start || pci_claim_resource(dev, idx) < 0) {

			/*

			 * Something is wrong with the region.
@@ -318,6 +320,8 @@ static void pcibios_allocate_dev_rom_resource(struct pci_dev *dev) 
	r = &dev->resource[PCI_ROM_RESOURCE];

	if (!r->flags || !r->start)

		return;

	if (r->parent) /* Already allocated */

		return;



	if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {

		r->end -= r->start;

drivers/acpi/pci_slot.c

+9 −5
Original line number Diff line number Diff line
@@ -159,13 +159,17 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) 
	return AE_OK;

}



void acpi_pci_slot_enumerate(struct pci_bus *bus, acpi_handle handle)

void acpi_pci_slot_enumerate(struct pci_bus *bus)

{

	acpi_handle handle = ACPI_HANDLE(bus->bridge);



	if (handle) {

		mutex_lock(&slot_list_lock);

		acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,

				    register_slot, NULL, bus, NULL);

		mutex_unlock(&slot_list_lock);

	}

}



void acpi_pci_slot_remove(struct pci_bus *bus)

{

drivers/acpi/sleep.c

+24 −15
Original line number Diff line number Diff line
@@ -420,10 +420,21 @@ static void acpi_pm_finish(void) 
}



/**

 *	acpi_pm_end - Finish up suspend sequence.

 * acpi_pm_start - Start system PM transition.

 */

static void acpi_pm_start(u32 acpi_state)

{

	acpi_target_sleep_state = acpi_state;

	acpi_sleep_tts_switch(acpi_target_sleep_state);

	acpi_scan_lock_acquire();

}



/**

 * acpi_pm_end - Finish up system PM transition.

 */

static void acpi_pm_end(void)

{

	acpi_scan_lock_release();

	/*

	 * This is necessary in case acpi_pm_finish() is not called during a

	 * failing transition to a sleep state.
@@ -451,21 +462,19 @@ static u32 acpi_suspend_states[] = { 
static int acpi_suspend_begin(suspend_state_t pm_state)

{

	u32 acpi_state = acpi_suspend_states[pm_state];

	int error = 0;

	int error;



	error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc();

	if (error)

		return error;



	if (sleep_states[acpi_state]) {

		acpi_target_sleep_state = acpi_state;

		acpi_sleep_tts_switch(acpi_target_sleep_state);

	} else {

		printk(KERN_ERR "ACPI does not support this state: %d\n",

			pm_state);

		error = -ENOSYS;

	if (!sleep_states[acpi_state]) {

		pr_err("ACPI does not support sleep state S%u\n", acpi_state);

		return -ENOSYS;

	}

	return error;



	acpi_pm_start(acpi_state);

	return 0;

}



/**
@@ -631,10 +640,8 @@ static int acpi_hibernation_begin(void) 
	int error;



	error = nvs_nosave ? 0 : suspend_nvs_alloc();

	if (!error) {

		acpi_target_sleep_state = ACPI_STATE_S4;

		acpi_sleep_tts_switch(acpi_target_sleep_state);

	}

	if (!error)

		acpi_pm_start(ACPI_STATE_S4);



	return error;

}
@@ -713,8 +720,10 @@ static int acpi_hibernation_begin_old(void) 
	if (!error) {

		if (!nvs_nosave)

			error = suspend_nvs_alloc();

		if (!error)

		if (!error) {

			acpi_target_sleep_state = ACPI_STATE_S4;

			acpi_scan_lock_acquire();

		}

	}

	return error;

}

drivers/pci/hotplug/acpiphp.h

+27 −27
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ 
#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)

#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)



struct acpiphp_context;

struct acpiphp_bridge;

struct acpiphp_slot;
@@ -59,6 +60,7 @@ struct slot { 
	struct hotplug_slot	*hotplug_slot;

	struct acpiphp_slot	*acpi_slot;

	struct hotplug_slot_info info;

	unsigned int sun;	/* ACPI _SUN (Slot User Number) value */

};



static inline const char *slot_name(struct slot *slot)
@@ -75,15 +77,11 @@ struct acpiphp_bridge { 
	struct list_head list;

	struct list_head slots;

	struct kref ref;

	acpi_handle handle;



	/* Ejectable PCI-to-PCI bridge (PCI bridge and PCI function) */

	struct acpiphp_func *func;

	struct acpiphp_context *context;



	int nr_slots;



	u32 flags;



	/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */

	struct pci_bus *pci_bus;
@@ -99,15 +97,13 @@ struct acpiphp_bridge { 
 */

struct acpiphp_slot {

	struct list_head node;

	struct acpiphp_bridge *bridge;	/* parent */

	struct pci_bus *bus;

	struct list_head funcs;		/* one slot may have different

					   objects (i.e. for each function) */

	struct slot *slot;

	struct mutex crit_sect;



	u8		device;		/* pci device# */



	unsigned long long sun;		/* ACPI _SUN (slot unique number) */

	u32		flags;		/* see below */

};
@@ -119,15 +115,32 @@ struct acpiphp_slot { 
 * typically 8 objects per slot (i.e. for each PCI function)

 */

struct acpiphp_func {

	struct acpiphp_slot *slot;	/* parent */

	struct acpiphp_bridge *parent;

	struct acpiphp_slot *slot;



	struct list_head sibling;

	acpi_handle	handle;



	u8		function;	/* pci function# */

	u32		flags;		/* see below */

};



struct acpiphp_context {

	acpi_handle handle;

	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);

}



static inline acpi_handle func_to_handle(struct acpiphp_func *func)

{

	return func_to_context(func)->handle;

}



/*

 * struct acpiphp_attention_info - device specific attention registration

 *
@@ -141,45 +154,32 @@ struct acpiphp_attention_info 
	struct module *owner;

};



/* PCI bus bridge HID */

#define ACPI_PCI_HOST_HID		"PNP0A03"



/* ACPI _STA method value (ignore bit 4; battery present) */

#define ACPI_STA_ALL			(0x0000000f)



/* bridge flags */

#define BRIDGE_HAS_EJ0		(0x00000001)



/* slot flags */



#define SLOT_POWEREDON		(0x00000001)

#define SLOT_ENABLED		(0x00000002)

#define SLOT_MULTIFUNCTION	(0x00000004)

#define SLOT_ENABLED		(0x00000001)



/* function flags */



#define FUNC_HAS_STA		(0x00000001)

#define FUNC_HAS_EJ0		(0x00000002)

#define FUNC_HAS_PS0		(0x00000010)

#define FUNC_HAS_PS1		(0x00000020)

#define FUNC_HAS_PS2		(0x00000040)

#define FUNC_HAS_PS3		(0x00000080)

#define FUNC_HAS_DCK            (0x00000100)

#define FUNC_HAS_DCK            (0x00000004)



/* function prototypes */



/* acpiphp_core.c */

int acpiphp_register_attention(struct acpiphp_attention_info*info);

int acpiphp_unregister_attention(struct acpiphp_attention_info *info);

int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot);

int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);

void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);



/* acpiphp_glue.c */

typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);



int acpiphp_enable_slot(struct acpiphp_slot *slot);

int acpiphp_disable_slot(struct acpiphp_slot *slot);

int acpiphp_eject_slot(struct acpiphp_slot *slot);

int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);

u8 acpiphp_get_power_status(struct acpiphp_slot *slot);

u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);

u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);

drivers/pci/hotplug/acpiphp_core.c

+7 −11
Original line number Diff line number Diff line
@@ -155,15 +155,11 @@ static int enable_slot(struct hotplug_slot *hotplug_slot) 
static int disable_slot(struct hotplug_slot *hotplug_slot)

{

	struct slot *slot = hotplug_slot->private;

	int retval;



	dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));



	/* disable the specified slot */

	retval = acpiphp_disable_slot(slot->acpi_slot);

	if (!retval)

		retval = acpiphp_eject_slot(slot->acpi_slot);

	return retval;

	return acpiphp_disable_and_eject_slot(slot->acpi_slot);

}
@@ -290,7 +286,8 @@ static void release_slot(struct hotplug_slot *hotplug_slot) 
}



/* callback routine to initialize 'struct slot' for each slot */

int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)

int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,

				  unsigned int sun)

{

	struct slot *slot;

	int retval = -ENOMEM;
@@ -317,12 +314,11 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot) 
	slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);



	acpiphp_slot->slot = slot;

	snprintf(name, SLOT_NAME_SIZE, "%llu", slot->acpi_slot->sun);

	slot->sun = sun;

	snprintf(name, SLOT_NAME_SIZE, "%u", sun);



	retval = pci_hp_register(slot->hotplug_slot,

					acpiphp_slot->bridge->pci_bus,

					acpiphp_slot->device,

					name);

	retval = pci_hp_register(slot->hotplug_slot, acpiphp_slot->bus,

				 acpiphp_slot->device, name);

	if (retval == -EBUSY)

		goto error_hpslot;

	if (retval) {