From: Miquel Raynal <miquel.raynal@bootlin.com>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Kees Cook <keescook@chromium.org>,
Wan ZongShun <mcuos.com@gmail.com>,
Boris Brezillon <bbrezillon@kernel.org>,
Richard Weinberger <richard@nod.at>,
linux-kernel@vger.kernel.org, Marek Vasut <marek.vasut@gmail.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
linux-mtd@lists.infradead.org,
Brian Norris <computersforpeace@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
Date: Fri, 12 Apr 2019 00:10:09 +0200 [thread overview]
Message-ID: <20190412001009.2db358b7@xps13> (raw)
In-Reply-To: <ce33f949-48c8-b32a-028e-ee68afc08e8f@embeddedor.com>
Hi Gustavo,
"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Thu, 11 Apr
2019 13:30:31 -0500:
> Hi Miquel,
>
> On 2/5/19 6:55 AM, Miquel Raynal wrote:
> [..]
> >> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
> >> if ((this->version_id & 0xf) == 0xe)
> >> this->options |= ONENAND_HAS_NOP_1;
> >> }
> >> + /* fall through */
> >>
> >> case ONENAND_DEVICE_DENSITY_2Gb:
> >> /* 2Gb DDP does not have 2 plane */
> >> if (!ONENAND_IS_DDP(this))
> >> this->options |= ONENAND_HAS_2PLANE;
> >> this->options |= ONENAND_HAS_UNLOCK_ALL;
> >> + /* fall through */
> >
> > This looks strange.
> >
> > In ONENAND_DEVICE_DENSITY_2Gb:
> > ONENAND_HAS_UNLOCK_ALL is set unconditionally.
> >
> > But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
> > if process is evaluated to true.
> >
> > Same problem with ONENAND_HAS_2PLANE:
> > - it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
> > - it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()
> >
> > Maybe this portion should be reworked because I am unsure if this is a
> > missing fall through or a bug.
> >
>
> I wonder if you had the chance to take a look into this piece of code.
>
> Thanks
> --
> Gustavo
What do you mean?
Thanks,
Miquèl
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next prev parent reply other threads:[~2019-04-11 22:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-28 18:15 [PATCH v2] mtd: rawnand: mark expected switch fall-throughs Gustavo A. R. Silva
2019-02-05 12:55 ` Miquel Raynal
2019-02-08 17:11 ` Gustavo A. R. Silva
2019-04-11 18:30 ` Gustavo A. R. Silva
2019-04-11 22:10 ` Miquel Raynal [this message]
2019-04-11 22:20 ` Gustavo A. R. Silva
2019-04-12 7:24 ` Miquel Raynal
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