On Tue, May 29, 2018 at 08:49:58PM +0000, Ruhl, Michael J wrote: > >From: Jason Gunthorpe [mailto:j...@mellanox.com] > >Sent: Tuesday, May 29, 2018 4:21 PM > >To: Ruhl, Michael J <michael.j.r...@intel.com> > >Cc: Leon Romanovsky <l...@kernel.org>; Doug Ledford > ><dledf...@redhat.com>; Leon Romanovsky <leo...@mellanox.com>; RDMA > >mailing list <linux-r...@vger.kernel.org>; Boris Pismenny > ><bor...@mellanox.com>; Matan Barak <mat...@mellanox.com>; Raed > >Salem <ra...@mellanox.com>; Yishai Hadas <yish...@mellanox.com>; Saeed > >Mahameed <sae...@mellanox.com>; linux-netdev > ><netdev@vger.kernel.org> > >Subject: Re: [PATCH rdma-next v2 01/13] IB/uverbs: Add an ib_uobject getter > >to ioctl() infrastructure > > > >On Tue, May 29, 2018 at 07:31:22PM +0000, Ruhl, Michael J wrote: > >> >- struct ib_uverbs_destroy_cq_resp resp; > >> > struct ib_uobject *uobj = > >> >- uverbs_attr_get(attrs, > >> >UVERBS_ATTR_DESTROY_CQ_HANDLE)->obj_attr.uobject; > >> >- struct ib_ucq_object *obj = container_of(uobj, struct ib_ucq_object, > >> >- uobject); > >> >+ uverbs_attr_get_uobject(attrs, > >> >UVERBS_ATTR_DESTROY_CQ_HANDLE); > >> >+ struct ib_uverbs_destroy_cq_resp resp; > >> >+ struct ib_ucq_object *obj; > >> > int ret; > >> > > >> >+ if (IS_ERR(uobj)) > >> >+ return PTR_ERR(uobj); > >> >+ > >> > >> I remember a conversation that if an method attribute was mandatory, that > >you did not need to > >> test the uobj for error (since it was checked in the infrastructure). > > > >Yes. > > > >> Is this error check necessary? > > > >No > > > >But there is no way to check one way or the other at compile time > >right now, and omitting the check makes smatch mad. > > Is smatch going to get mad at (same patch):
Yes, this is where it already got mad, IIRC :( Fixing this whole thing is a todo on my list.. Jason
