On Mon, Aug 12, 2019 at 10:31:19AM -0400, Doug Ledford wrote:
> On Thu, 2019-08-08 at 11:39 +0300, Leon Romanovsky wrote:
> > From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> >
> > NULL-ing notifier_call is performed under protection
> > of mlx5_ib_multiport_mutex lock. Such protection is
> > not easily spotted and better to be guarded by lockdep
> > annotation.
> >
> > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> > ---
> > Based on -rc commit: 23eaf3b5c1a7 ("RDMA/mlx5: Release locks during
> > notifier unregister")
> > ---
> > drivers/infiniband/hw/mlx5/main.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/infiniband/hw/mlx5/main.c
> > b/drivers/infiniband/hw/mlx5/main.c
> > index 7933534be931..63969484421c 100644
> > --- a/drivers/infiniband/hw/mlx5/main.c
> > +++ b/drivers/infiniband/hw/mlx5/main.c
> > @@ -5835,6 +5835,8 @@ static void mlx5_ib_unbind_slave_port(struct
> > mlx5_ib_dev *ibdev,
> > int err;
> > int i;
> >
> > + lockdep_assert_held(&mlx5_ib_multiport_mutex);
> > +
> > mlx5_ib_cleanup_cong_debugfs(ibdev, port_num);
> >
> > spin_lock(&port->mp.mpi_lock);
> > --
> > 2.20.1
> >
>
> Hi Leon,
>
> This patch needed to catch both the unbind and the bind/init routine as
> they both require the multiport mutex be held. Can you respin please?
It has comment "5889 /* The mlx5_ib_multiport_mutex should be held when
calling this function */", why do we need lockdep?
Just kidding, sending fixed patch now.
Thanks
>
> --
> Doug Ledford <dledford@xxxxxxxxxx>
> GPG KeyID: B826A3330E572FDD
> Fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD
