From 165c552c35052284e8ec4f7e9c027dfd33490e2c Mon Sep 17 00:00:00 2001 From: Bryan O'Sullivan Date: Thu, 15 Mar 2007 14:44:46 -0700 Subject: [PATCH] IB/ipath: Fix user memory region creation when IOMMU present The loop which initializes the user memory region from an array of pages was using the wrong limit for the array. This worked OK when dma_map_sg() returned the same number as the number of pages. This patch fixes the problem. Signed-off-by: Ralph Campbell Signed-off-by: Bryan O'Sullivan Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ipath/ipath_mr.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/ipath/ipath_mr.c b/drivers/infiniband/hw/ipath/ipath_mr.c index 8cc8598d6c6..31e70732e36 100644 --- a/drivers/infiniband/hw/ipath/ipath_mr.c +++ b/drivers/infiniband/hw/ipath/ipath_mr.c @@ -210,9 +210,15 @@ struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region, m = 0; n = 0; list_for_each_entry(chunk, ®ion->chunk_list, list) { - for (i = 0; i < chunk->nmap; i++) { - mr->mr.map[m]->segs[n].vaddr = - page_address(chunk->page_list[i].page); + for (i = 0; i < chunk->nents; i++) { + void *vaddr; + + vaddr = page_address(chunk->page_list[i].page); + if (!vaddr) { + ret = ERR_PTR(-EINVAL); + goto bail; + } + mr->mr.map[m]->segs[n].vaddr = vaddr; mr->mr.map[m]->segs[n].length = region->page_size; n++; if (n == IPATH_SEGSZ) { -- 2.41.1