[PATCH] powerpc/iommu: Fix iommu pool initialization

[Benjamin Herrenschmidt]

The iommu pool patch has a bug where it would cause a crash when using
only one pool (based on the size of the DMA window).

Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---
 arch/powerpc/kernel/iommu.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index fbefe72..ff5a6ce 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -676,9 +676,9 @@ struct iommu_table *iommu_init_table(struct iommu_table *tbl, int nid)
 		tbl->nr_pools = 1;
 
 	/* We reserve the top 1/4 of the table for large allocations */
-	tbl->poolsize = (tbl->it_size * 3 / 4) / IOMMU_NR_POOLS;
+	tbl->poolsize = (tbl->it_size * 3 / 4) / tbl->nr_pools;
 
-	for (i = 0; i < IOMMU_NR_POOLS; i++) {
+	for (i = 0; i < tbl->nr_pools; i++) {
 		p = &tbl->pools[i];
 		spin_lock_init(&(p->lock));
 		p->start = tbl->poolsize * i;