PCI: Convert alloc_pci_dev(void) to pci_alloc_dev(bus)

Use the new pci_alloc_dev(bus) to replace the existing using of
alloc_pci_dev(void).

[bhelgaas: drop pci_bus ref later in pci_release_dev()]
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Airlie <airlied@linux.ie>
Cc: Neela Syam Kolli <megaraidlinux@lsi.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>

arch/powerpc/kernel/pci_of_scan.c

@@ -128,7 +128,7 @@ struct pci_dev *of_create_pci_dev(struct device_node *node,
 	const char *type;
 	struct pci_slot *slot;
 
-	dev = alloc_pci_dev();
+	dev = pci_alloc_dev(bus);
 	if (!dev)
 		return NULL;
 	type = of_get_property(node, "device_type", NULL);
@@ -137,7 +137,6 @@ struct pci_dev *of_create_pci_dev(struct device_node *node,
 
 	pr_debug("    create device, devfn: %x, type: %s\n", devfn, type);
 
-	dev->bus = bus;
 	dev->dev.of_node = of_node_get(node);
 	dev->dev.parent = bus->bridge;
 	dev->dev.bus = &pci_bus_type;

arch/sparc/kernel/pci.c

@@ -254,7 +254,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 	const char *type;
 	u32 class;
 
-	dev = alloc_pci_dev();
+	dev = pci_alloc_dev(bus);
 	if (!dev)
 		return NULL;
 
@@ -281,7 +281,6 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 		printk("    create device, devfn: %x, type: %s\n",
 		       devfn, type);
 
-	dev->bus = bus;
 	dev->sysdata = node;
 	dev->dev.parent = bus->bridge;
 	dev->dev.bus = &pci_bus_type;

drivers/char/agp/alpha-agp.c

@@ -174,7 +174,7 @@ alpha_core_agp_setup(void)
 	/*
 	 * Build a fake pci_dev struct
 	 */
-	pdev = alloc_pci_dev();
+	pdev = pci_alloc_dev(NULL);
 	if (!pdev)
 		return -ENOMEM;
 	pdev->vendor = 0xffff;

drivers/char/agp/parisc-agp.c

@@ -333,7 +333,7 @@ parisc_agp_setup(void __iomem *ioc_hpa, void __iomem *lba_hpa)
 	struct agp_bridge_data *bridge;
 	int error = 0;
 
-	fake_bridge_dev = alloc_pci_dev();
+	fake_bridge_dev = pci_alloc_dev(NULL);
 	if (!fake_bridge_dev) {
 		error = -ENOMEM;
 		goto fail;

drivers/pci/iov.c

@@ -75,18 +75,20 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset)
 	struct pci_dev *virtfn;
 	struct resource *res;
 	struct pci_sriov *iov = dev->sriov;
+	struct pci_bus *bus;
 
-	virtfn = alloc_pci_dev();
+	virtfn = pci_alloc_dev(NULL);
 	if (!virtfn)
 		return -ENOMEM;
 
 	mutex_lock(&iov->dev->sriov->lock);
-	virtfn->bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id));
-	if (!virtfn->bus) {
+	bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id));
+	if (!bus) {
 		kfree(virtfn);
 		mutex_unlock(&iov->dev->sriov->lock);
 		return -ENOMEM;
 	}
+	virtfn->bus = pci_bus_get(bus);
 	virtfn->devfn = virtfn_devfn(dev, id);
 	virtfn->vendor = dev->vendor;
 	pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_DID, &virtfn->device);

drivers/pci/probe.c

@@ -1132,6 +1132,7 @@ static void pci_release_dev(struct device *dev)
 	pci_dev = to_pci_dev(dev);
 	pci_release_capabilities(pci_dev);
 	pci_release_of_node(pci_dev);
+	pci_bus_put(pci_dev->bus);
 	kfree(pci_dev);
 }
 
@@ -1270,11 +1271,10 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
 	if (!pci_bus_read_dev_vendor_id(bus, devfn, &l, 60*1000))
 		return NULL;
 
-	dev = alloc_pci_dev();
+	dev = pci_alloc_dev(bus);
 	if (!dev)
 		return NULL;
 
-	dev->bus = bus;
 	dev->devfn = devfn;
 	dev->vendor = l & 0xffff;
 	dev->device = (l >> 16) & 0xffff;
@@ -1282,6 +1282,7 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
 	pci_set_of_node(dev);
 
 	if (pci_setup_device(dev)) {
+		pci_bus_put(dev->bus);
 		kfree(dev);
 		return NULL;
 	}

drivers/scsi/megaraid.c

@@ -2026,7 +2026,7 @@ megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
 static inline int
 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
 {
-	*pdev = alloc_pci_dev();
+	*pdev = pci_alloc_dev(NULL);
 
 	if( *pdev == NULL ) return -1;