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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-11-10 13:35:17 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-10 14:11:32 +0100 |
| commit | 72d03802b8b5c841ab1da82bff0652628cbadf60 (patch) | |
| tree | cd0329e3b9d6dec8585e3bfed976c9e7eee79fbf /arch/x86/kernel/pci-dma.c | |
| parent | x86: Handle HW IOMMU initialization failure gracefully (diff) | |
| download | linux-72d03802b8b5c841ab1da82bff0652628cbadf60.tar.xz linux-72d03802b8b5c841ab1da82bff0652628cbadf60.zip | |
x86, 32-bit: Fix swiotlb boot crash
Ingo Molnar reported this boot crash:
[ 8.655620] pata_amd 0000:00:06.0: version 0.4.1
[ 8.660286] BUG: unable to handle kernel NULL pointer dereference at 00000034
[ 8.663572] IP: [<c100617b>] dma_supported+0x3b/0xa4
[ 8.663572] *pde = 00000000
Initialize dma_ops properly in the 32-bit case.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/pci-dma.c')
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index a234e63c2656..63eebee80e75 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -129,6 +129,8 @@ void __init pci_iommu_alloc(void) #ifdef CONFIG_X86_64 /* free the range so iommu could get some range less than 4G */ dma32_free_bootmem(); +#else + dma_ops = &nommu_dma_ops; #endif pci_swiotlb_init(); if (use_swiotlb) |