Revert "net: fix rds_iovec page count overflow"

This reverts commit bd378dd6df5ca43021a49f72441a6c14d9784bed (originally
commit 1b1f693d7ad6d193862dcb1118540a030c5e761f upstream).

I messed it up in backporting it to the .32-stable kernel, so revert it
for now and try it again the next review cycle.

Cc: Thomas Pollet <thomas.pollet@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Grover <andy.grover@oracle.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index f7d8c08bd6b2d97d5f74b9345c2a9054c8dc23a7..6b09b941d3a77b220d88f288844aa15b7efa3362 100644 (file)
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -473,14 +473,6 @@ static struct rds_rdma_op *rds_rdma_prepare(struct rds_sock *rs,
 
                max_pages = max(nr, max_pages);
                nr_pages += nr;
-
-               /*
-                * nr_pages for one entry is limited to (UINT_MAX>>PAGE_SHIFT)+1,
-                * so tot_pages cannot overflow without first going negative.
-                */
-               if ((int)nr_pages < 0)
-                       ret = -EINVAL;
-                       goto out;
        }
 
        pages = kcalloc(max_pages, sizeof(struct page *), GFP_KERNEL);