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| author | Ivan Kokshaysky <ink@jurassic.park.msu.ru> | 2008-03-09 16:31:17 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-09 10:05:15 -0700 |
| commit | ab875cf67e89eef150ae8d4ef09c361e47b6b398 (patch) | |
| tree | 172ba1078681d4b49b041ead998412f127cb52a4 /arch/alpha | |
| parent | 393d94d98b19089ec172566e23557997931b137e (diff) | |
| download | linux-stable-ab875cf67e89eef150ae8d4ef09c361e47b6b398.tar.gz linux-stable-ab875cf67e89eef150ae8d4ef09c361e47b6b398.tar.bz2 linux-stable-ab875cf67e89eef150ae8d4ef09c361e47b6b398.zip | |
alpha: fix iommu-related boot panic
This fixes a boot panic due to a typo in the recent iommu patchset from
FUJITA Tomonori <tomof@acm.org> - the code used dma_get_max_seg_size()
instead of dma_get_seg_boundary().
It also removes a couple of unnecessary BUG_ON() and ALIGN() macros.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Reported-and-tested-by: Bob Tracy <rct@frus.com>
Acked-by: FUJITA Tomonori <tomof@acm.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/alpha')
| -rw-r--r-- | arch/alpha/kernel/pci_iommu.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c index be6fa105cd34..e07a23fc5b74 100644 --- a/arch/alpha/kernel/pci_iommu.c +++ b/arch/alpha/kernel/pci_iommu.c @@ -144,15 +144,14 @@ iommu_arena_find_pages(struct device *dev, struct pci_iommu_arena *arena, unsigned long base; unsigned long boundary_size; - BUG_ON(arena->dma_base & ~PAGE_MASK); base = arena->dma_base >> PAGE_SHIFT; - if (dev) - boundary_size = ALIGN(dma_get_max_seg_size(dev) + 1, PAGE_SIZE) - >> PAGE_SHIFT; - else - boundary_size = ALIGN(1UL << 32, PAGE_SIZE) >> PAGE_SHIFT; - - BUG_ON(!is_power_of_2(boundary_size)); + if (dev) { + boundary_size = dma_get_seg_boundary(dev) + 1; + BUG_ON(!is_power_of_2(boundary_size)); + boundary_size >>= PAGE_SHIFT; + } else { + boundary_size = 1UL << (32 - PAGE_SHIFT); + } /* Search forward for the first mask-aligned sequence of N free ptes */ ptes = arena->ptes; |