linux-kernel - [PATCH v2 05/29] x86/PCI: use pci_scan_bus() instead of pci_scan_bus

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Date:	Thu, 13 Oct 2011 22:27:32 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	linux-pci@...r.kernel.org
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 05/29] x86/PCI: use pci_scan_bus() instead of
	pci_scan_bus_parented()

This doesn't change any functionality, but it makes a subsequent patch
slightly simpler.

pci_scan_bus(NULL, ...) and pci_scan_bus_parented() are identical except
that pci_scan_bus() also calls pci_bus_add_devices():

  pci_scan_bus_parented
    pci_create_bus
    pci_scan_child_bus

  pci_scan_bus
    pci_create_bus
    pci_scan_child_bus
    pci_bus_add_devices

All callers of pcibios_scan_root() call pci_bus_add_devices() explicitly,
and we don't pass a parent device, so we might as well use pci_scan_bus().

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 arch/x86/pci/common.c   |    2 +-
 arch/x86/pci/legacy.c   |    3 ---
 arch/x86/pci/numaq_32.c |    2 --
 3 files changed, 1 insertions(+), 6 deletions(-)

diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 92df322..b389a2d 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -456,7 +456,7 @@ struct pci_bus * __devinit pcibios_scan_root(int busnum)
 	sd->node = get_mp_bus_to_node(busnum);
 
 	printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
-	bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
+	bus = pci_scan_bus(busnum, &pci_root_ops, sd);
 	if (!bus)
 		kfree(sd);
 
diff --git a/arch/x86/pci/legacy.c b/arch/x86/pci/legacy.c
index c89266b..6e3f26a 100644
--- a/arch/x86/pci/legacy.c
+++ b/arch/x86/pci/legacy.c
@@ -30,9 +30,6 @@ int __init pci_legacy_init(void)
 
 	printk("PCI: Probing PCI hardware\n");
 	pci_root_bus = pcibios_scan_root(0);
-	if (pci_root_bus)
-		pci_bus_add_devices(pci_root_bus);
-
 	return 0;
 }
 
diff --git a/arch/x86/pci/numaq_32.c b/arch/x86/pci/numaq_32.c
index 512a88c..2b94aa9 100644
--- a/arch/x86/pci/numaq_32.c
+++ b/arch/x86/pci/numaq_32.c
@@ -153,8 +153,6 @@ int __init pci_numaq_init(void)
 	raw_pci_ops = &pci_direct_conf1_mq;
 
 	pci_root_bus = pcibios_scan_root(0);
-	if (pci_root_bus)
-		pci_bus_add_devices(pci_root_bus);
 	if (num_online_nodes() > 1)
 		for_each_online_node(quad) {
 			if (quad == 0)

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