Commit 4daeaf68 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

ACPI / PCI: Make PCI IRQ link driver use struct acpi_scan_handler 



Make the ACPI PCI IRQ link driver use struct acpi_scan_handler
for representing the object used to set up ACPI interrupt links and
to remove data structures used for this purpose before unregistering
the corresponding ACPI device nodes.

This simplifies the code slightly and reduces the kernel's memory
footprint by avoiding the registration of a struct device_driver
object with the driver core and creation of its sysfs directory
which is unnecessary.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarYinghai Lu <yinghai@kernel.org>
Acked-by: default avatarToshi Kani <toshi.kani@hp.com>
parent 00c43b96

drivers/acpi/internal.h

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
int init_acpi_device_notify(void);

int acpi_scan_init(void);

void acpi_pci_root_init(void);

void acpi_pci_link_init(void);

int acpi_sysfs_init(void);

void acpi_csrt_init(void);

drivers/acpi/pci_link.c

+14 −33
Original line number Diff line number Diff line
@@ -53,23 +53,19 @@ ACPI_MODULE_NAME("pci_link"); 
#define ACPI_PCI_LINK_FILE_STATUS	"state"

#define ACPI_PCI_LINK_MAX_POSSIBLE	16



static int acpi_pci_link_add(struct acpi_device *device);

static int acpi_pci_link_remove(struct acpi_device *device);

static int acpi_pci_link_add(struct acpi_device *device,

			     const struct acpi_device_id *not_used);

static void acpi_pci_link_remove(struct acpi_device *device);



static const struct acpi_device_id link_device_ids[] = {

	{"PNP0C0F", 0},

	{"", 0},

};

MODULE_DEVICE_TABLE(acpi, link_device_ids);



static struct acpi_driver acpi_pci_link_driver = {

	.name = "pci_link",

	.class = ACPI_PCI_LINK_CLASS,

static struct acpi_scan_handler pci_link_handler = {

	.ids = link_device_ids,

	.ops = {

		.add = acpi_pci_link_add,

		.remove = acpi_pci_link_remove,

	},

	.attach = acpi_pci_link_add,

	.detach = acpi_pci_link_remove,

};



/*
@@ -692,7 +688,8 @@ int acpi_pci_link_free_irq(acpi_handle handle) 
                                 Driver Interface

   -------------------------------------------------------------------------- */



static int acpi_pci_link_add(struct acpi_device *device)

static int acpi_pci_link_add(struct acpi_device *device,

			     const struct acpi_device_id *not_used)

{

	int result;

	struct acpi_pci_link *link;
@@ -746,7 +743,7 @@ static int acpi_pci_link_add(struct acpi_device *device) 
	if (result)

		kfree(link);



	return result;

	return result < 0 ? result : 1;

}



static int acpi_pci_link_resume(struct acpi_pci_link *link)
@@ -766,7 +763,7 @@ static void irqrouter_resume(void) 
	}

}



static int acpi_pci_link_remove(struct acpi_device *device)

static void acpi_pci_link_remove(struct acpi_device *device)

{

	struct acpi_pci_link *link;
@@ -777,7 +774,6 @@ static int acpi_pci_link_remove(struct acpi_device *device) 
	mutex_unlock(&acpi_link_lock);



	kfree(link);

	return 0;

}



/*
@@ -874,20 +870,10 @@ static struct syscore_ops irqrouter_syscore_ops = { 
	.resume = irqrouter_resume,

};



static int __init irqrouter_init_ops(void)

{

	if (!acpi_disabled && !acpi_noirq)

		register_syscore_ops(&irqrouter_syscore_ops);



	return 0;

}



device_initcall(irqrouter_init_ops);



static int __init acpi_pci_link_init(void)

void __init acpi_pci_link_init(void)

{

	if (acpi_noirq)

		return 0;

		return;



	if (acpi_irq_balance == -1) {

		/* no command line switch: enable balancing in IOAPIC mode */
@@ -896,11 +882,6 @@ static int __init acpi_pci_link_init(void) 
		else

			acpi_irq_balance = 0;

	}



	if (acpi_bus_register_driver(&acpi_pci_link_driver) < 0)

		return -ENODEV;



	return 0;

	register_syscore_ops(&irqrouter_syscore_ops);

	acpi_scan_add_handler(&pci_link_handler);

}
 


subsys_initcall(acpi_pci_link_init);

drivers/acpi/scan.c

+1 −0
Original line number Diff line number Diff line
@@ -1774,6 +1774,7 @@ int __init acpi_scan_init(void) 
	}



	acpi_pci_root_init();

	acpi_pci_link_init();

	acpi_csrt_init();



	/*

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