From 0999ed7f57728c1919b131207e47d9b311cfbd74 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Thu, 26 Apr 2007 17:01:04 +1000 Subject: [PATCH] Revert "[POWERPC] DMA 4GB boundary protection" This reverts commit 618d3adc351a24c4c48437c767befb88ca2d199d, because it is superseded by 569975591c5530fdc9c7a3c45122e5e46f075a74. --- arch/powerpc/kernel/iommu.c | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index d2598e2e7bb..c08ceca6277 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; -- 2.20.1