PCI: PCIe portdrv: Remove struct pcie_port_service_id

The PCI Express port driver uses 'struct pcie_port_service_id' for
matching port service devices and drivers, but this structure
contains fields that duplicate information from the port device
itself (vendor, device, subvendor, subdevice) and fields that are not
used by any existing port service driver (class, class_mask,
drvier_data).  Also, both existing port service drivers (AER and
PCIe HP) don't even use the vendor and device fields for device
matching.  Therefore 'struct pcie_port_service_id' can be removed
altogether and the only useful members of it (port_type, service) can
be introduced directly into the port service device and port service
driver structures.  That simplifies the code quite a bit and reduces
its size.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

8 files changed, 30 insertions, 66 deletions

diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c
index ad88357..21734c3 100644
--- a/drivers/pci/hotplug/pciehp_acpi.c
+++ b/drivers/pci/hotplug/pciehp_acpi.c
@@ -67,16 +67,6 @@ static int __init parse_detect_mode(void)
 	return PCIEHP_DETECT_DEFAULT;
 }
 
-static struct pcie_port_service_id __initdata port_pci_ids[] = {
-	{
-		.vendor = PCI_ANY_ID,
-		.device = PCI_ANY_ID,
-		.port_type = PCIE_ANY_PORT,
-		.service_type = PCIE_PORT_SERVICE_HP,
-		.driver_data =  0,
-        }, { /* end: all zeroes */ }
-};
-
 static int __initdata dup_slot_id;
 static int __initdata acpi_slot_detected;
 static struct list_head __initdata dummy_slots = LIST_HEAD_INIT(dummy_slots);
@@ -110,7 +100,8 @@ static int __init dummy_probe(struct pcie_device *dev)
 
 static struct pcie_port_service_driver __initdata dummy_driver = {
         .name           = "pciehp_dummy",
-        .id_table       = port_pci_ids,
+	.port_type	= PCIE_ANY_PORT,
+	.service	= PCIE_PORT_SERVICE_HP,
         .probe          = dummy_probe,
 };
 
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 3429b21..3d21bbb 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -505,18 +505,10 @@ static int pciehp_resume (struct pcie_device *dev)
 }
 #endif
 
-static struct pcie_port_service_id port_pci_ids[] = { {
-	.vendor = PCI_ANY_ID,
-	.device = PCI_ANY_ID,
-	.port_type = PCIE_ANY_PORT,
-	.service_type = PCIE_PORT_SERVICE_HP,
-	.driver_data =	0,
-	}, { /* end: all zeroes */ }
-};
-
 static struct pcie_port_service_driver hpdriver_portdrv = {
 	.name		= PCIE_MODULE_NAME,
-	.id_table	= &port_pci_ids[0],
+	.port_type	= PCIE_ANY_PORT,
+	.service	= PCIE_PORT_SERVICE_HP,
 
 	.probe		= pciehp_probe,
 	.remove		= pciehp_remove,
diff --git a/drivers/pci/pcie/aer/aerdrv.c b/drivers/pci/pcie/aer/aerdrv.c
index 57c4120..e11c031 100644
--- a/drivers/pci/pcie/aer/aerdrv.c
+++ b/drivers/pci/pcie/aer/aerdrv.c
@@ -48,19 +48,6 @@ static pci_ers_result_t aer_error_detected(struct pci_dev *dev,
 static void aer_error_resume(struct pci_dev *dev);
 static pci_ers_result_t aer_root_reset(struct pci_dev *dev);
 
-/*
- * PCI Express bus's AER Root service driver data structure
- */
-static struct pcie_port_service_id aer_id[] = {
-	{
-	.vendor 	= PCI_ANY_ID,
-	.device 	= PCI_ANY_ID,
-	.port_type 	= PCIE_RC_PORT,
-	.service_type 	= PCIE_PORT_SERVICE_AER,
-	},
-	{ /* end: all zeroes */ }
-};
-
 static struct pci_error_handlers aer_error_handlers = {
 	.error_detected = aer_error_detected,
 	.resume = aer_error_resume,
@@ -68,7 +55,8 @@ static struct pci_error_handlers aer_error_handlers = {
 
 static struct pcie_port_service_driver aerdriver = {
 	.name		= "aer",
-	.id_table	= &aer_id[0],
+	.port_type	= PCIE_ANY_PORT,
+	.service	= PCIE_PORT_SERVICE_AER,
 
 	.probe		= aer_probe,
 	.remove		= aer_remove,
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 3825750..307452f 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -351,21 +351,21 @@ static int find_aer_service_iter(struct device *device, void *data)
 {
 	struct device_driver *driver;
 	struct pcie_port_service_driver *service_driver;
-	struct pcie_device *pcie_dev;
 	struct find_aer_service_data *result;
 
 	result = (struct find_aer_service_data *) data;
 
 	if (device->bus == &pcie_port_bus_type) {
-		pcie_dev = to_pcie_device(device);
-		if (pcie_dev->id.port_type == PCIE_SW_DOWNSTREAM_PORT)
+		struct pcie_port_data *port_data;
+
+		port_data = pci_get_drvdata(to_pcie_device(device)->port);
+		if (port_data->port_type == PCIE_SW_DOWNSTREAM_PORT)
 			result->is_downstream = 1;
 
 		driver = device->driver;
 		if (driver) {
 			service_driver = to_service_driver(driver);
-			if (service_driver->id_table->service_type ==
-					PCIE_PORT_SERVICE_AER) {
+			if (service_driver->service == PCIE_PORT_SERVICE_AER) {
 				result->aer_driver = service_driver;
 				return 1;
 			}
diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h
index b0dcbc7..ad4d082 100644
--- a/drivers/pci/pcie/portdrv.h
+++ b/drivers/pci/pcie/portdrv.h
@@ -28,11 +28,6 @@
 
 #define get_descriptor_id(type, service) (((type - 4) << 4) | service)
 
-struct pcie_port_data {
-	int port_type;		/* Type of the port */
-	int port_irq_mode;	/* [0:INTx | 1:MSI | 2:MSI-X] */
-};
-
 extern struct bus_type pcie_port_bus_type;
 extern int pcie_port_device_probe(struct pci_dev *dev);
 extern int pcie_port_device_register(struct pci_dev *dev);
diff --git a/drivers/pci/pcie/portdrv_bus.c b/drivers/pci/pcie/portdrv_bus.c
index eec89b7..ef3a4ee 100644
--- a/drivers/pci/pcie/portdrv_bus.c
+++ b/drivers/pci/pcie/portdrv_bus.c
@@ -26,20 +26,22 @@ EXPORT_SYMBOL_GPL(pcie_port_bus_type);
 static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
 {
 	struct pcie_device *pciedev;
+	struct pcie_port_data *port_data;
 	struct pcie_port_service_driver *driver;
 
 	if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
 		return 0;
-	
+
 	pciedev = to_pcie_device(dev);
 	driver = to_service_driver(drv);
-	if (   (driver->id_table->vendor != PCI_ANY_ID && 
-		driver->id_table->vendor != pciedev->id.vendor) ||
-	       (driver->id_table->device != PCI_ANY_ID &&
-		driver->id_table->device != pciedev->id.device) ||	
-	       (driver->id_table->port_type != PCIE_ANY_PORT &&
-		driver->id_table->port_type != pciedev->id.port_type) ||
-		driver->id_table->service_type != pciedev->id.service_type )
+
+	if (driver->service != pciedev->service)
+		return 0;
+
+	port_data = pci_get_drvdata(pciedev->port);
+
+	if (driver->port_type != PCIE_ANY_PORT
+	     && driver->port_type != port_data->port_type)
 		return 0;
 
 	return 1;
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 682524b..843d9e3 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -140,10 +140,7 @@ static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
 
 	dev->port = parent;
 	dev->irq = irq;
-	dev->id.vendor = parent->vendor;
-	dev->id.device = parent->device;
-	dev->id.port_type = port_type;
-	dev->id.service_type = service_type;
+	dev->service = service_type;
 
 	/* Initialize generic device interface */
 	device = &dev->device;
diff --git a/include/linux/pcieport_if.h b/include/linux/pcieport_if.h
index 59e90b8..a383207 100644
--- a/include/linux/pcieport_if.h
+++ b/include/linux/pcieport_if.h
@@ -27,18 +27,15 @@
 #define PCIE_PORT_MSI_MODE		1
 #define PCIE_PORT_MSIX_MODE		2
 
-struct pcie_port_service_id {
-	__u32 vendor, device;		/* Vendor and device ID or PCI_ANY_ID*/
-	__u32 subvendor, subdevice;	/* Subsystem ID's or PCI_ANY_ID */
-	__u32 class, class_mask;	/* (class,subclass,prog-if) triplet */
-	__u32 port_type, service_type;	/* Port Entity */
-	kernel_ulong_t driver_data;
+struct pcie_port_data {
+	int port_type;		/* Type of the port */
+	int port_irq_mode;	/* [0:INTx | 1:MSI | 2:MSI-X] */
 };
 
 struct pcie_device {
 	int 		irq;	    /* Service IRQ/MSI/MSI-X Vector */
-	struct pcie_port_service_id id;	/* Service ID */
-	struct pci_dev	*port;	    /* Root/Upstream/Downstream Port */
+	struct pci_dev *port;	    /* Root/Upstream/Downstream Port */
+	u32		service;    /* Port service this device represents */
 	void		*priv_data; /* Service Private Data */
 	struct device	device;     /* Generic Device Interface */
 };
@@ -67,7 +64,9 @@ struct pcie_port_service_driver {
 	/* Link Reset Capability - AER service driver specific */
 	pci_ers_result_t (*reset_link) (struct pci_dev *dev);
 
-	const struct pcie_port_service_id *id_table;
+	int port_type;  /* Type of the port this driver can handle */
+	u32 service;    /* Port service this device represents */
+
 	struct device_driver driver;
 };
 #define to_service_driver(d) \