On Sun, Dec 09, 2018 at 09:45:46AM -0700, Jason Gunthorpe wrote:
> On Sun, Dec 09, 2018 at 10:56:46AM +0200, Leon Romanovsky wrote:
> > On Thu, Dec 06, 2018 at 08:46:42PM -0700, Jason Gunthorpe wrote:
> > > On Wed, Dec 05, 2018 at 04:06:12PM +0200, Leon Romanovsky wrote:
> > > > From: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
> > > >
> > > > __mlx5_ib_add didn't allocate ib_device, this means __mlx5_ib_remove
> > > > shouldn't free it, hence make the alloc/dealloc symmetric.
> > > >
> > > > Put dealloc_device outside __mlx5_ib_remove and convert __mlx5_ib_add
> > > > to return int value rather than dev pointer on success and null on failure.
> > > >
> > > > Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
> > > > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> > > > drivers/infiniband/hw/mlx5/ib_rep.c | 9 +++++++--
> > > > drivers/infiniband/hw/mlx5/main.c | 23 +++++++++++++++--------
> > > > drivers/infiniband/hw/mlx5/mlx5_ib.h | 4 ++--
> > > > 3 files changed, 24 insertions(+), 12 deletions(-)
> > > >
> > > > diff --git a/drivers/infiniband/hw/mlx5/ib_rep.c b/drivers/infiniband/hw/mlx5/ib_rep.c
> > > > index 8a682d86d634..5ee383b0fc32 100644
> > > > +++ b/drivers/infiniband/hw/mlx5/ib_rep.c
> > > > @@ -61,6 +61,7 @@ static int
> > > > mlx5_ib_vport_rep_load(struct mlx5_core_dev *dev, struct mlx5_eswitch_rep *rep)
> > > > {
> > > > struct mlx5_ib_dev *ibdev;
> > > > + int err;
> > > >
> > > > ibdev = (struct mlx5_ib_dev *)ib_alloc_device(sizeof(*ibdev));
> > >
> > > This should be container_of not a cast.
> >
> > I'm preparing v1 now and not sure how to handle this comment.
> > First, it wasn't part of this patch, second (more important),
> > ibdev is declared as pointer of mlx5_ib_dev, so unclear how
> > do you see container_of be used here with uninitialized ibdev.
>
> ibdev = container_of(ib_alloc_device(sizeof(*ibdev)), struct
> mlx6_ib_dev, ib_dev);
>
> And this whole pattern really should be a standard macro:
Interesting, I worked on something similar right now, except the fact
that ib_alloc_device() can return NULL.
>
> #define ib_alloc_device_t(_struct, _member) \
> container_of(ib_alloc_device(sizeof(_struct) + \
> BUILD_BUG_ON(offsetof(_struct, _member) != 0)), _struct, _member)
>
> Jason
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