Re: [rdma-next 01/12] RDMA/bnxt_re: Use for_each_sg_dma_page iterator on umem SGL

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On Wed, Feb 13, 2019 at 9:28 PM Jason Gunthorpe <jgg@xxxxxxxx> wrote:
>
> On Wed, Feb 13, 2019 at 01:12:37PM +0200, Gal Pressman wrote:
> > On 11-Feb-19 17:24, Shiraz Saleem wrote:
> > > diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c
> > > index c8502c2..c8478c1 100644
> > > +++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c
> > > @@ -85,7 +85,7 @@ static void __free_pbl(struct pci_dev *pdev, struct bnxt_qplib_pbl *pbl,
> > >  static int __alloc_pbl(struct pci_dev *pdev, struct bnxt_qplib_pbl *pbl,
> > >                    struct scatterlist *sghead, u32 pages, u32 pg_size)
> > >  {
> > > -   struct scatterlist *sg;
> > > +   struct sg_dma_page_iter sg_iter;
> > >     bool is_umem = false;
> > >     int i;
> > >
> > > @@ -116,12 +116,13 @@ static int __alloc_pbl(struct pci_dev *pdev, struct bnxt_qplib_pbl *pbl,
> > >     } else {
> > >             i = 0;
> > >             is_umem = true;
> > > -           for_each_sg(sghead, sg, pages, i) {
> > > -                   pbl->pg_map_arr[i] = sg_dma_address(sg);
> > > -                   pbl->pg_arr[i] = sg_virt(sg);
> > > +           for_each_sg_dma_page(sghead, &sg_iter, pages, 0) {
> > > +                   pbl->pg_map_arr[i] = sg_page_iter_dma_address(&sg_iter);
> > > +                   pbl->pg_arr[i] = NULL;
> >                       if (!pbl->pg_arr[i])
> >
> > Surely something went wrong here?
>
> That if does look wrong.
>
> I recall Shiraz removed the pg_arr as it wasn't being used, so maybe
> the if should go to?
>
> Devesh?
>
> Someone send a patch...
We will sent the patch.
>
> Jason



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