Re: [PATCH] PCI: endpoint: pci-epf-{,v}ntb: fix a check for no epc alignment constraint

[Shunsuke Mie]

2022年9月20日(火) 3:55 Bjorn Helgaas <helgaas@xxxxxxxxxx>:
>
> On Fri, Sep 16, 2022 at 04:56:51PM +0900, Shunsuke Mie wrote:
> > Some pci endpoint controllers has not alignment constraint, and the
>
> s/pci/PCI/
> s/has not/have no/
> s/constraint/constraints/
>
> > epc_features->align becomes 0. In this case, IS_ALIGNED() in
> > epf_ntb_config_spad_bar_alloc() doesn't work well. So this patch adds the 0
> > checking before the IS_ALIGNED().
>
> s/So this patch adds .../Check for this before IS_ALIGNED()/
Thank you. I'll fix these.
>
> > Signed-off-by: Shunsuke Mie <mie@xxxxxxxxxx>
> > ---
> >  drivers/pci/endpoint/functions/pci-epf-ntb.c  | 2 +-
> >  drivers/pci/endpoint/functions/pci-epf-vntb.c | 2 +-
> >  2 files changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/pci/endpoint/functions/pci-epf-ntb.c b/drivers/pci/endpoint/functions/pci-epf-ntb.c
> > index 9a00448c7e61..f74155ee8d72 100644
> > --- a/drivers/pci/endpoint/functions/pci-epf-ntb.c
> > +++ b/drivers/pci/endpoint/functions/pci-epf-ntb.c
> > @@ -1021,7 +1021,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb,
> >       peer_size = peer_epc_features->bar_fixed_size[peer_barno];
> >
> >       /* Check if epc_features is populated incorrectly */
> > -     if ((!IS_ALIGNED(size, align)))
> > +     if (align && (!IS_ALIGNED(size, align)))
> >               return -EINVAL;
> >
> >       spad_count = ntb->spad_count;
> > diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> > index 0ea85e1d292e..5e346c0a0f05 100644
> > --- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
> > +++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> > @@ -418,7 +418,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
> >       size = epc_features->bar_fixed_size[barno];
> >       align = epc_features->align;
> >
> > -     if ((!IS_ALIGNED(size, align)))
> > +     if (align && !IS_ALIGNED(size, align))
> >               return -EINVAL;
> >
> >       spad_count = ntb->spad_count;
> > --
> > 2.17.1
> >

Best,
Shunsuke