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x86/agp: Fix agp_amd64_init and agp_amd64_cleanup 

This fixes the regression introduced by the commit
f405d2c023.

The above commit fixes the following issue:

  http://marc.info/?l=linux-kernel&m=126192729110083&w=2

However, it doesn't work properly when you remove and insert the
agp_amd64 module again.

agp_amd64_init() and agp_amd64_cleanup should be called only
when gart_iommu is not called earlier (that is, the GART IOMMU
is not enabled). We need to use 'gart_iommu_aperture' to see if
GART IOMMU is enabled or not.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: mitov@issp.bas.bg
Cc: davej@redhat.com
LKML-Reference: <20100104161603L.fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
FUJITA Tomonori 2010-01-04 16:16:23 +09:00 committed by Ingo Molnar
parent fcfbb2b5fa
commit 42590a7501
2 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/kernel/aperture_64.c
View File

@ -31,6 +31,7 @@
#include <asm/x86_init.h>
int gart_iommu_aperture;
EXPORT_SYMBOL_GPL(gart_iommu_aperture);
int gart_iommu_aperture_disabled __initdata;
int gart_iommu_aperture_allowed __initdata;

5
drivers/char/agp/amd64-agp.c
View File

@ -725,12 +725,11 @@ static struct pci_driver agp_amd64_pci_driver = {
int __init agp_amd64_init(void)
{
int err = 0;
static int done = 0;
if (agp_off)
return -EINVAL;
if (done++)
if (gart_iommu_aperture)
return agp_bridges_found ? 0 : -ENODEV;
err = pci_register_driver(&agp_amd64_pci_driver);
@ -771,6 +770,8 @@ int __init agp_amd64_init(void)
static void __exit agp_amd64_cleanup(void)
{
if (gart_iommu_aperture)
return;
if (aperture_resource)
release_resource(aperture_resource);
pci_unregister_driver(&agp_amd64_pci_driver);