Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
IronPort-SDR: teQvRFCIq5uN5KuOH1Z1cfaI7yUY1J88mfKwESrIAKlMZNIzTn3Q/bA3nyT5uFEXhcbGg3uvp8
 46n67bx8nX2g==
IronPort-SDR: 97bGbyL6YMQTKXS8v/uAnE7kejawVmtdJ7xUNwRv4412nrgH29Uv0FezDr/4/nZGZWddQ6sQa6
 TUAzMI00e65A==
Date:   Mon, 3 Aug 2020 16:05:32 +0300
From:   Mika Westerberg <mika.westerberg@linux.intel.com>
To:     Daniel Gutson <daniel@eclypsium.com>
Cc:     Richard Hughes <hughsient@gmail.com>,
        Tudor Ambarus <tudor.ambarus@microchip.com>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Boris Brezillon <bbrezillon@kernel.org>,
        linux-mtd <linux-mtd@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Alex Bazhaniuk <alex@eclypsium.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [PATCH] Module argument to control whether intel-spi-pci
 attempts to turn the SPI flash chip writeable
Message-ID: <20200803130532.GY1375436@lahna.fi.intel.com>
References: <20200724212853.11601-1-daniel.gutson@eclypsium.com>
 <20200803095720.GC1375436@lahna.fi.intel.com>
 <CAD2FfiFt6=OueX3E0g2ckPU+7F69yCmM0+bzF_6UD1sd4E_k_A@mail.gmail.com>
 <20200803102711.GK1375436@lahna.fi.intel.com>
 <CAFmMkTHSjQZJNzvUzLHHJ7sUTVX4BV6TwB=P8EO-HNk_cv8RKg@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAFmMkTHSjQZJNzvUzLHHJ7sUTVX4BV6TwB=P8EO-HNk_cv8RKg@mail.gmail.com>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, Aug 03, 2020 at 09:58:23AM -0300, Daniel Gutson wrote:
> On Mon, Aug 3, 2020 at 7:27 AM Mika Westerberg
> <mika.westerberg@linux.intel.com> wrote:
> >
> > On Mon, Aug 03, 2020 at 11:18:12AM +0100, Richard Hughes wrote:
> > > On Mon, 3 Aug 2020 at 10:57, Mika Westerberg
> > > <mika.westerberg@linux.intel.com> wrote:
> > > > I think instead of this we should simply make it so that the driver
> > > > never tries to make the chip writable.
> > >
> > > I think this is a good idea, but I wasn't sure if it was an acceptable
> > > behaviour change. Should the driver still try to set BCR_WPD when
> > > writing an image (i.e. defer the setting of write enable until later),
> > > or just not set the BCR register at all? I think your last comment was
> > > the latter, but wanted to check.
> >
> > I would say not set it at all. I think it was (my) mistake to set it in
> > the first place.
> 
> Do you want me to remove the module parameter from intel-spi too and
> do the same?

No, I think that should still be left there. Then by default it is
read-only and you can only enable writing if the BIOS allows it and that
the user actually requested it.