Commit 51b89f7a authored Aug 11, 2009 by Fenghua Yu Committed by Fenghua Yu Aug 11, 2009

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



In commit 160c1d8e,
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>

parent 85dfd81d

arch/ia64/kernel/pci-dma.c

+0 −5

Original line number	Diff line number	Diff line
		@@ -69,11 +69,6 @@ iommu_dma_init(void)

		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
		only work for pci_alloc_coherent.
		The caller just has to use GFP_DMA in this case. */