4.17-stable review patch. If anyone has any objections, please let me know.
------------------ From: Christophe Jaillet <[email protected]> [ Upstream commit 3dc7c7badb7502ec3e3aa817a8bdd9e53aa54c52 ] Before returning -EPERM we should release some resources, as already done in the other error handling path of the function. Fixes: d8f9cc328c88 ("IB/mlx4: Mark user MR as writable if actual virtual memory is writable") Signed-off-by: Christophe JAILLET <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/infiniband/hw/mlx4/mr.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/drivers/infiniband/hw/mlx4/mr.c +++ b/drivers/infiniband/hw/mlx4/mr.c @@ -486,8 +486,11 @@ int mlx4_ib_rereg_user_mr(struct ib_mr * } if (flags & IB_MR_REREG_ACCESS) { - if (ib_access_writable(mr_access_flags) && !mmr->umem->writable) - return -EPERM; + if (ib_access_writable(mr_access_flags) && + !mmr->umem->writable) { + err = -EPERM; + goto release_mpt_entry; + } err = mlx4_mr_hw_change_access(dev->dev, *pmpt_entry, convert_access(mr_access_flags));
