diff options
| author | Ingo Molnar <mingo@elte.hu> | 2011-06-04 12:13:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-06-04 12:13:06 +0200 |
| commit | 710054ba25c0d1f8f41c22ce13ba336503fb5318 (patch) | |
| tree | f9b09b722bf511841539173d946f90a20fc2e59a /drivers/pci/iova.c | |
| parent | 74c355fbdfedd3820046dba4f537876cea54c207 (diff) | |
| parent | b273fa9716aa1564bee88ceee62f9042981cdc81 (diff) | |
Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Diffstat (limited to 'drivers/pci/iova.c')
| -rw-r--r-- | drivers/pci/iova.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/pci/iova.c b/drivers/pci/iova.c index 9606e599a47..c5c274ab5c5 100644 --- a/drivers/pci/iova.c +++ b/drivers/pci/iova.c @@ -63,8 +63,16 @@ __cached_rbnode_delete_update(struct iova_domain *iovad, struct iova *free) curr = iovad->cached32_node; cached_iova = container_of(curr, struct iova, node); - if (free->pfn_lo >= cached_iova->pfn_lo) - iovad->cached32_node = rb_next(&free->node); + if (free->pfn_lo >= cached_iova->pfn_lo) { + struct rb_node *node = rb_next(&free->node); + struct iova *iova = container_of(node, struct iova, node); + + /* only cache if it's below 32bit pfn */ + if (node && iova->pfn_lo < iovad->dma_32bit_pfn) + iovad->cached32_node = node; + else + iovad->cached32_node = NULL; + } } /* Computes the padding size required, to make the |