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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-01-04 08:16:23 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-01-13 11:15:37 +0100 |
| commit | 42590a75019a50012f25a962246498dead428433 (patch) | |
| tree | f248821c7f38d988e2d03ddaaa7c63c59e0e3206 /drivers/char | |
| parent | x86: SGI UV: Fix mapping of MMIO registers (diff) | |
| download | linux-42590a75019a50012f25a962246498dead428433.tar.xz linux-42590a75019a50012f25a962246498dead428433.zip | |
x86/agp: Fix agp_amd64_init and agp_amd64_cleanup
This fixes the regression introduced by the commit
f405d2c02395a74d3883bd03ded36457aa3697ad.
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>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/agp/amd64-agp.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c index 5aa7a586a7ff..1afb8968a342 100644 --- a/drivers/char/agp/amd64-agp.c +++ b/drivers/char/agp/amd64-agp.c @@ -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); |