linux-kernel - [tip:x86/urgent] x86/agp: Fix amd64-agp module initialization regression

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Date:	Thu, 4 Feb 2010 09:51:58 GMT
From:	tip-bot for FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	fujita.tomonori@....ntt.co.jp, tglx@...utronix.de, mingo@...e.hu,
	mitov@...p.bas.bg
Subject: [tip:x86/urgent] x86/agp: Fix amd64-agp module initialization regression

Commit-ID:  06df6dafb5d9e3cfa3588c6ce79328b91582b6af
Gitweb:     http://git.kernel.org/tip/06df6dafb5d9e3cfa3588c6ce79328b91582b6af
Author:     FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
AuthorDate: Thu, 4 Feb 2010 14:43:38 +0900
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 4 Feb 2010 07:27:26 +0100

x86/agp: Fix amd64-agp module initialization regression

This fixes the regression introduced by commit
42590a75019a50012f25a962246498dead428433 ("x86/agp: Fix
agp_amd64_init and agp_amd64_cleanup").

The commit 61684ceaad4f65d1a9832c722f7bd5e7fc714de9 fixed the
above regression but it's not enough. When amd64-agp is built as
a module, AGP isn't initialized, iommu is initialized, all the
aperture is owned by the iommu.

Reported-by: Marin Mitov <mitov@...p.bas.bg>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Tested-by: Marin Mitov <mitov@...p.bas.bg>
LKML-Reference: <20100204090802S.fujita.tomonori@....ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 drivers/char/agp/amd64-agp.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 34cf04e..fd50ead 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -767,16 +767,19 @@ int __init agp_amd64_init(void)
 
 static int __init agp_amd64_mod_init(void)
 {
+#ifndef MODULE
 	if (gart_iommu_aperture)
 		return agp_bridges_found ? 0 : -ENODEV;
-
+#endif
 	return agp_amd64_init();
 }
 
 static void __exit agp_amd64_cleanup(void)
 {
+#ifndef MODULE
 	if (gart_iommu_aperture)
 		return;
+#endif
 	if (aperture_resource)
 		release_resource(aperture_resource);
 	pci_unregister_driver(&agp_amd64_pci_driver);
--
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