diff options
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index a276064471b..1f7b2547408 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -917,6 +917,18 @@ static int __init cell_iommu_fixed_mapping_init(void) return -1; } + /* We must have dma-ranges properties for fixed mapping to work */ + for (np = NULL; (np = of_find_all_nodes(np));) { + if (of_find_property(np, "dma-ranges", NULL)) + break; + } + of_node_put(np); + + if (!np) { + pr_debug("iommu: no dma-ranges found, no fixed mapping\n"); + return -1; + } + /* The default setup is to have the fixed mapping sit after the * dynamic region, so find the top of the largest IOMMU window * on any axon, then add the size of RAM and that's our max value. |