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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-01-25 06:10:47 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-01-31 07:52:26 +0100 |
| commit | 61684ceaad4f65d1a9832c722f7bd5e7fc714de9 (patch) | |
| tree | 8a2509f1582656759efbecf98037a6aaff8d128d /drivers | |
| parent | x86: Add quirk for Intel DG45FC board to avoid low memory corruption (diff) | |
| download | linux-61684ceaad4f65d1a9832c722f7bd5e7fc714de9.tar.xz linux-61684ceaad4f65d1a9832c722f7bd5e7fc714de9.zip | |
x86/agp: Fix agp_amd64_init regression
This fixes the regression introduced by commit
42590a75019a50012f25a962246498dead428433 ("x86/agp: Fix
agp_amd64_init and agp_amd64_cleanup").
The above commit changes agp_amd64_init() not to do anything if
gart_iommu_aperture is not zero.
If GART iommu calls agp_amd64_init(), we need to skip
agp_amd64_init() when it's called later via module_init.
The problem is that gart_iommu_init() calls agp_amd64_init()
with not zero gart_iommu_aperture so agp_amd64_init() is never
initialized.
When gart_iommu_init() calls agp_amd64_init(), agp should be
always initialized.
Reported-by: Marin Mitov <mitov@issp.bas.bg>
Reported-by: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: Marin Mitov <mitov@issp.bas.bg>
Tested-by: Kevin Winchester <kjwinchester@gmail.com>
Cc: davej@redhat.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <20100125141006O.fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/agp/amd64-agp.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c index 1afb8968a342..34cf04e21795 100644 --- a/drivers/char/agp/amd64-agp.c +++ b/drivers/char/agp/amd64-agp.c @@ -729,9 +729,6 @@ int __init agp_amd64_init(void) if (agp_off) return -EINVAL; - if (gart_iommu_aperture) - return agp_bridges_found ? 0 : -ENODEV; - err = pci_register_driver(&agp_amd64_pci_driver); if (err < 0) return err; @@ -768,6 +765,14 @@ int __init agp_amd64_init(void) return err; } +static int __init agp_amd64_mod_init(void) +{ + if (gart_iommu_aperture) + return agp_bridges_found ? 0 : -ENODEV; + + return agp_amd64_init(); +} + static void __exit agp_amd64_cleanup(void) { if (gart_iommu_aperture) @@ -777,7 +782,7 @@ static void __exit agp_amd64_cleanup(void) pci_unregister_driver(&agp_amd64_pci_driver); } -module_init(agp_amd64_init); +module_init(agp_amd64_mod_init); module_exit(agp_amd64_cleanup); MODULE_AUTHOR("Dave Jones <davej@redhat.com>, Andi Kleen"); |