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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-27 16:28:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-27 16:28:39 -0700 |
| commit | 79b95a454bb5c1d9b7287d1016a70885ba3f346c (patch) | |
| tree | 86f9de05a5915d5c9f89ecf661f7600cd875cd2d | |
| parent | 72ab373a5688a78cbdaf3bf96012e597d5399bb7 (diff) | |
| download | linux-79b95a454bb5c1d9b7287d1016a70885ba3f346c.tar.bz2 | |
Revert "x86-64: Avoid unnecessary double bouncing for swiotlb"
Commit id 6142891a0c0209c91aa4a98f725de0d6e2ed4918
Andi Kleen reports that it seems to break things for some people,
and since it's purely a small optimization, revert it for now.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/asm-x86_64/pci.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/asm-x86_64/pci.h b/include/asm-x86_64/pci.h index 5a82a6762c21..eeb3088a1c9e 100644 --- a/include/asm-x86_64/pci.h +++ b/include/asm-x86_64/pci.h @@ -50,10 +50,10 @@ extern int iommu_setup(char *opt); * address space. The networking and block device layers use * this boolean for bounce buffer decisions * - * On x86-64 it mostly equals, but we set it to zero to tell some subsystems - * that an hard or soft IOMMU is available. + * On AMD64 it mostly equals, but we set it to zero to tell some subsystems + * that an IOMMU is available. */ -#define PCI_DMA_BUS_IS_PHYS 0 +#define PCI_DMA_BUS_IS_PHYS (no_iommu ? 1 : 0) /* * x86-64 always supports DAC, but sometimes it is useful to force |