linux-kernel - [PATCH v9 08/30] PCI: Update pci_host

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Date:	Fri, 3 Apr 2015 17:25:42 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Jiang Liu <jiang.liu@...ux.intel.com>, <linux-pci@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	<linux-kernel@...r.kernel.org>,
	Marc Zyngier <marc.zyngier@....com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>, <dja@...ens.net>,
	<x86@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Tony Luck <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	"Guan Xuetao" <gxt@...c.pku.edu.cn>, <linux-alpha@...r.kernel.org>,
	<linux-m68k@...ts.linux-m68k.org>, Liviu Dudau <liviu@...au.co.uk>,
	"Arnd Bergmann" <arnd@...db.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"Yijing Wang" <wangyijing@...wei.com>,
	Yijing Wang <wangyijing0307@...il.com>
Subject: [PATCH v9 08/30] PCI: Update pci_host_bridge bus resource

From: Yijing Wang <wangyijing0307@...il.com>

Sometimes, the bus resource start number is not equal to
root bus number. For example, in pci_scan_bus(), we always
add the default bus resource which start bus number is 0,
but the root bus number callers given may != 0, so
we need to update pci_host_bridge bus resource, because we
would check whether host bridge bus resoruce is confict
in later patch.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
 drivers/pci/host-bridge.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index ecc1a7c..1a9834b 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -26,8 +26,11 @@ static void pci_host_update_busn_res(
 	struct resource_entry *window;
 
 	resource_list_for_each_entry(window, resources)
-		if (window->res->flags & IORESOURCE_BUS)
+		if (window->res->flags & IORESOURCE_BUS) {
+			if (bus > window->res->start)
+				window->res->start = bus;
 			return;
+		}
 
 	pr_info(
 	 "No busn resource found for pci%04x:%02x, will use [bus %02x-ff]\n",
-- 
1.7.1

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