linux-kernel - [PATCH -v11 21/30] PCI: Add pci_bus_replace_busn

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Date:	Sun, 18 Mar 2012 22:42:52 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Tony Luck <tony.luck@...el.com>,
	David Miller <davem@...emloft.net>, x86 <x86@...nel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Dominik Brodowski <linux@...inikbrodowski.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH -v11 21/30] PCI: Add pci_bus_replace_busn_res()

It will use resource_replace to put bus's busn_res in the resource tree.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 drivers/pci/probe.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 67cd0a7..c5fe935 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -626,6 +626,21 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
 	return child;
 }
 
+static void pci_bus_replace_busn_res(struct pci_bus *b,
+					 struct resource *busn_res)
+{
+	struct resource *res = &b->busn_res;
+
+	/* busn_res must be registered already*/
+	if (!busn_res->parent)
+		return;
+
+	resource_replace(busn_res, res);
+
+	dev_printk(KERN_DEBUG, &b->dev, "busn_res: %pR is updated under %pR\n",
+			res, res->parent);
+}
+
 struct pci_bus *__ref pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr)
 {
 	struct pci_bus *child;
-- 
1.7.7

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