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intel-iommu: dump mappings but don't die on pte already set

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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2009-06-29 22:06:43 +01:00
parent 9051aa0268
commit 1bf20f0dc5
1 changed files with 10 additions and 1 deletions
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11
drivers/pci/intel-iommu.c
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@ -1673,7 +1673,16 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
/* We don't need lock here, nobody else
* touches the iova range
*/
BUG_ON(dma_pte_addr(pte));
if (unlikely(dma_pte_addr(pte))) {
static int dumps = 5;
printk(KERN_CRIT "ERROR: DMA PTE for vPFN 0x%lx already set (to %llx)\n",
iov_pfn, pte->val);
if (dumps) {
dumps--;
debug_dma_dump_mappings(NULL);
}
WARN_ON(1);
}
pte->val = pteval;
pte++;
if (!nr_pages ||