On Mon, Aug 28, 2017 at 11:15:14AM -0400, Doug Ledford wrote: > On Sun, 2017-08-27 at 14:10 +0300, Leon Romanovsky wrote: > > On Thu, Aug 24, 2017 at 04:40:42PM -0400, Doug Ledford wrote: > > > On Thu, 2017-08-17 at 15:50 +0300, Leon Romanovsky wrote: > > > > From: Parav Pandit <parav@xxxxxxxxxxxx> > > > > > > > > This patch introduces two helper functions to copy ah attributes > > > > from uverbs to internal ib_ah_attr structure and the other way > > > > during modify qp and query qp respectively. > > > > > > > > Signed-off-by: Parav Pandit <parav@xxxxxxxxxxxx> > > > > Reviewed-by: Daniel Jurgens <danielj@xxxxxxxxxxxx> > > > > Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx> > > > > Reviewed-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx> > > > > --- > > > > drivers/infiniband/core/uverbs_cmd.c | 124 ++++++++++++++------- > > > > ---- > > > > ---------- > > > > 1 file changed, 49 insertions(+), 75 deletions(-) > > > > > > I had to fix this patch up considerably... > > > > > > > diff --git a/drivers/infiniband/core/uverbs_cmd.c > > > > b/drivers/infiniband/core/uverbs_cmd.c > > > > index 670176b670a0..515425a50059 100644 > > > > --- a/drivers/infiniband/core/uverbs_cmd.c > > > > +++ b/drivers/infiniband/core/uverbs_cmd.c > > > > > > > > @@ -1936,6 +1926,28 @@ static int modify_qp_mask(enum ib_qp_type > > > > qp_type, int mask) > > > > } > > > > } > > > > > > > > +static void copy_ah_attr_from_uverbs(struct ib_device *dev, > ^^^^^^^^^^^^^^^^^^^^ > From your patch... > > > > > + struct rdma_ah_attr > > > > *rdma_attr, > > > > + struct ib_uverbs_qp_dest > > > > > > > And we had a fix here where we only copy the ah attributes if the > > > user > > > set the flag for it, so what I ended up with looks like this: > > > > > > if (cmd->base.attr_mask & IB_QP_AV) > > > copy_ah_attr_from_uverbs(qp->device, &attr- > > > >ah_attr, > > > &cmd->base.dest); > > > > > > if (cmd->base.attr_mask & IB_QP_ALT_PATH) > > > copy_ah_attr_from_uverbs(qp->device, &attr- > > > > alt_ah_attr, > > > > > > &cmd->base.alt_dest); > > > > Doug, > > > > It should be "qp" and not "qp->device" in copy_ah_attr_from_uverbs(). > > > > 1998 if (cmd->base.attr_mask & IB_QP_AV) > > 1999 copy_ah_attr_from_uverbs(qp, &attr->ah_attr, > > &cmd->base.dest); > > 2000 if (cmd->base.attr_mask & IB_QP_ALT_PATH) > > 2001 copy_ah_attr_from_uverbs(qp, &attr->alt_ah_attr, > > 2002 &cmd->base.alt_dest); > > 2003 ret = ib_modify_qp_with_udata(qp, attr, > > 2004 modify_qp_mask(qp- > > >qp_type, > > 2005 cmd- > > >base.attr_mask), > > 2006 udata); > > I'm pretty sure you need to re-read your own patch Leon ;-). The > helper you added uses struct ib_device, so a pointer to the qp would > not work. And it wouldn't have even compiled if I had that wrong. OK, I reread it and it helped me to find the differences. In rdma-rc, there is the patch from Noa "IB/core: Avoid accessing non-allocated memory when inferring port type", which plays exactly at the same place as this one. Because, I'm creating my rdma-next for testing, I'm merging -rcX with -next and my merge conflict resolution was to move + attr->ah_attr.type = rdma_ah_find_type(qp->device, + cmd->base.dest.port_num); to the copy_ah_attr_from_uverbs and to change function signature to be "static void copy_ah_attr_from_uverbs(struct ib_qp *qp," Thanks > > -- > Doug Ledford <dledford@xxxxxxxxxx> > GPG KeyID: B826A3330E572FDD > Key fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html
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