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Bug Fix arch/ia64/kernel/pci-dma.c: fix recursive dma_supported() call in iommu_dma_supported() 

In commit 160c1d8e40,
dma_ops->dma_supported = iommu_dma_supported;

This dma_ops->dma_supported is first called in platform_dma_init() during kernel
boot. Then dma_ops->dma_supported will be called recursively in
iommu_dma_supported.

Kernel can not boot because kernel can not get out of iommu_dma_supported until
it runs out of stack memory.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
This commit is contained in:
Fenghua Yu 2009-08-11 14:52:10 -07:00 committed by Fenghua Yu
parent 85dfd81dc5
commit 51b89f7a66
1 changed files with 0 additions and 5 deletions
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5
arch/ia64/kernel/pci-dma.c
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@ -69,11 +69,6 @@ iommu_dma_init(void)
int iommu_dma_supported(struct device *dev, u64 mask) int iommu_dma_supported(struct device *dev, u64 mask)
{ {
struct dma_map_ops *ops = platform_dma_get_ops(dev);
if (ops->dma_supported)
return ops->dma_supported(dev, mask);
/* Copied from i386. Doesn't make much sense, because it will /* Copied from i386. Doesn't make much sense, because it will
only work for pci_alloc_coherent. only work for pci_alloc_coherent.
The caller just has to use GFP_DMA in this case. */ The caller just has to use GFP_DMA in this case. */