tree b1138d36523cc8f0f5b3fae12f81f573eae96997
parent c65a3500b2947d344862da8cce626b7cc7ec5758
author Roland Dreier <rolandd@cisco.com> 1209610375 -0700
committer Roland Dreier <rolandd@cisco.com> 1209610375 -0700

IB/mlx4: Fix off-by-one errors in calls to mlx4_ib_free_cq_buf()

When I merged bbf8eed1 ("IB/mlx4: Add support for resizing CQs") I
changed things around so that mlx4_ib_alloc_cq_buf() and
mlx4_ib_free_cq_buf() were used everywhere they could be.  However, I
screwed up the number of entries passed into mlx4_ib_alloc_cq_buf()
in a couple places -- the function bumps the number of entries
internally, so the caller shouldn't add 1 as well.

Passing a too-big value for the number of entries to mlx4_ib_free_cq_buf()
can cause the cleanup to go off the end of an array and corrupt
allocator state in interesting ways.

Signed-off-by: Roland Dreier <rolandd@cisco.com>