linux-kernel - Re: [PATCH v4 2/6] PCI: rcar: Fix calculating mask for PCIEPAMR register

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 19 Feb 2020 08:47:46 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Andrew Murray <andrew.murray@....com>,
        linux-pci <linux-pci@...r.kernel.org>,
        LAK <linux-arm-kernel@...ts.infradead.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v4 2/6] PCI: rcar: Fix calculating mask for PCIEPAMR register

Hi Bjorn,

Thank you for the review.

On Wed, Feb 12, 2020 at 2:04 PM Bjorn Helgaas <helgaas@...nel.org> wrote:
>
> On Sat, Feb 08, 2020 at 06:36:37PM +0000, Lad Prabhakar wrote:
> > The mask value was calculated incorrectly for PCIEPAMR register if the
> > size was less the 128bytes, this patch fixes the above by adding a check
> > on size.
>
> s/less the/less than/
> s/128bytes,/128 bytes./
> s/this patch fixes the above/Fix this issue/
>
My bad will fix that.

> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> >  drivers/pci/controller/pcie-rcar.c | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
> > index d5568db..c76a92a 100644
> > --- a/drivers/pci/controller/pcie-rcar.c
> > +++ b/drivers/pci/controller/pcie-rcar.c
> > @@ -71,7 +71,7 @@ void rcar_pcie_set_outbound(int win, void __iomem *base,
> >       /* Setup PCIe address space mappings for each resource */
> >       resource_size_t res_start;
> >       resource_size_t size;
> > -     u32 mask;
> > +     u32 mask = 0x0;
> >
> >       rcar_pci_write_reg(base, 0x00000000, PCIEPTCTLR(win));
> >
> > @@ -80,7 +80,8 @@ void rcar_pcie_set_outbound(int win, void __iomem *base,
> >        * keeps things pretty simple.
> >        */
> >       size = resource_size(res);
> > -     mask = (roundup_pow_of_two(size) / SZ_128) - 1;
> > +     if (size > 128)
> > +             mask = (roundup_pow_of_two(size) / SZ_128) - 1;
>
> I would put the "mask = 0x0" right here so it's all in one place,
> i.e.,
>
>   if (size > 128)
>     mask = (roundup_pow_of_two(size) / SZ_128) - 1;
>   else
>     mask = 0x0;
>
Sure will change that.

Cheers,
--Prabhakar Lad

> >       rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win));
> >
> >       if (!host) {
> > --
> > 2.7.4
> >