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| author | Paul Mackerras <paulus@samba.org> | 2007-04-26 17:01:04 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-04-26 19:48:15 +1000 |
| commit | 0999ed7f57728c1919b131207e47d9b311cfbd74 (patch) | |
| tree | 2264f1cb9a5aded6297f2481f6f54b6aa860aaa1 /arch/powerpc/kernel/iommu.c | |
| parent | c78f830547087aa4143affd3404a854995603544 (diff) | |
| download | linux-rt-0999ed7f57728c1919b131207e47d9b311cfbd74.tar.gz | |
Revert "[POWERPC] DMA 4GB boundary protection"
This reverts commit 618d3adc351a24c4c48437c767befb88ca2d199d, because
it is superseded by 569975591c5530fdc9c7a3c45122e5e46f075a74.
Diffstat (limited to 'arch/powerpc/kernel/iommu.c')
| -rw-r--r-- | arch/powerpc/kernel/iommu.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index d2598e2e7bbe..c08ceca6277d 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -89,7 +89,6 @@ static unsigned long iommu_range_alloc(struct iommu_table *tbl, unsigned int align_order) { unsigned long n, end, i, start; - unsigned long start_addr, end_addr; unsigned long limit; int largealloc = npages > 15; int pass = 0; @@ -160,15 +159,6 @@ static unsigned long iommu_range_alloc(struct iommu_table *tbl, } } - /* DMA cannot cross 4 GB boundary */ - start_addr = (n + tbl->it_offset) << PAGE_SHIFT; - end_addr = (end + tbl->it_offset) << PAGE_SHIFT; - if ((start_addr >> 32) != (end_addr >> 32)) { - end_addr &= 0xffffffff00000000l; - start = (end_addr >> PAGE_SHIFT) - tbl->it_offset; - goto again; - } - for (i = n; i < end; i++) if (test_bit(i, tbl->it_map)) { start = i+1; |