linux-kernel - [PATCH -v3 2/3] x86,pci, acpi: host bridge windows inherit BUSY flag from parent

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Message-ID: <4BC4E0E9.7000203@oracle.com>
Date:	Tue, 13 Apr 2010 14:23:53 -0700
From:	Yinghai <yinghai.lu@...cle.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Bjorn Helgaas <bjorn.helgaas@...com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Andy Isaacson <adi@...apodia.org>, guenter.roeck@...csson.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Renninger <trenn@...e.de>
Subject: [PATCH -v3 2/3] x86,pci, acpi: host bridge windows inherit BUSY flag
 from parent



If a host bridge window falls inside a region the architecture has
marked busy, the window should inherit the busy flag so we don't
try to assign that region to a device.

[commit log is from Bjorn]

Tested-by: Andy Isaacson <adi@...apodia.org>
Cc: Bjorn Helgaas <bjorn.helgaas@...com>
Acked-by: Bjorn Helgaas <bjorn.helgaas@...com>
Signed-off-by: Yinghai Lu <yinghai@...nel.org>

---
 arch/x86/pci/acpi.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux-2.6/arch/x86/pci/acpi.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/acpi.c
+++ linux-2.6/arch/x86/pci/acpi.c
@@ -175,6 +175,10 @@ setup_resource(struct acpi_resource *acp
 			"conflicts with %s %pR\n",
 			res, conflict->name, conflict);
 	} else {
+		/* In case it falls in big reserved region */
+		if (res->parent->flags & IORESOURCE_BUSY)
+			res->flags |= IORESOURCE_BUSY;
+
 		pci_bus_add_resource(info->bus, res, 0);
 		info->res_num++;
 		if (addr.translation_offset)
--
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