[openib-general] [PATCH 14 of 53] ipath - forbid empty MRs

[Bryan O'Sullivan]

Don't allow zero-length regions to be created.

Signed-off-by: Bryan O'Sullivan <bos at pathscale.com>

diff -r 02a05b853d20 -r 5d9fbba3222e drivers/infiniband/hw/ipath/ipath_mr.c
--- a/drivers/infiniband/hw/ipath/ipath_mr.c	Fri May 12 15:55:28 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_mr.c	Fri May 12 15:55:28 2006 -0700
@@ -168,6 +168,11 @@ struct ib_mr *ipath_reg_user_mr(struct i
 	struct ib_umem_chunk *chunk;
 	int n, m, i;
 	struct ib_mr *ret;
+
+	if (region->length == 0) {
+		ret = ERR_PTR(-EINVAL);
+		goto bail;
+	}
 
 	n = 0;
 	list_for_each_entry(chunk, &region->chunk_list, list)