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From: Richard Weinberger <richard@nod.at>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Kees Cook <keescook@chromium.org>,
	Boris Brezillon <bbrezillon@kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Marek Vasut <marek.vasut@gmail.com>,
	linux-mtd <linux-mtd@lists.infradead.org>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Brian Norris <computersforpeace@gmail.com>,
	David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH] mtd: cfi_util: mark expected switch fall-throughs
Date: Tue, 7 May 2019 17:49:05 +0200 (CEST)
Message-ID: <785015370.48464.1557244145722.JavaMail.zimbra@nod.at> (raw)
In-Reply-To: <3034821c-3cd0-b0c5-a6fd-548fd87486a4@embeddedor.com>

----- Ursprüngliche Mail -----
> Von: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
> An: "Miquel Raynal" <miquel.raynal@bootlin.com>
> CC: "David Woodhouse" <dwmw2@infradead.org>, "Brian Norris" <computersforpeace@gmail.com>, "Boris Brezillon"
> <bbrezillon@kernel.org>, "Marek Vasut" <marek.vasut@gmail.com>, "richard" <richard@nod.at>, "linux-mtd"
> <linux-mtd@lists.infradead.org>, "linux-kernel" <linux-kernel@vger.kernel.org>, "Kees Cook" <keescook@chromium.org>
> Gesendet: Dienstag, 7. Mai 2019 16:54:12
> Betreff: Re: [PATCH] mtd: cfi_util: mark expected switch fall-throughs

> Hi all,
> 
> Thanks a lot for this, Richard:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git/log/?h=mtd%2Fnext&qt=grep&q=fall-through
> 
> There are only two of these warnings left to be addressed in
> MTD[1]:
> 
>        > @@ -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.
> 
> 
> Thanks
> --
> Gustavo
> 
> [1] https://lore.kernel.org/patchwork/patch/1036251/

Did we miss this patch? AFAICT it is in -next too.

Thanks,
//richard

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Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-08 18:02 Gustavo A. R. Silva
2019-03-20 20:20 ` Gustavo A. R. Silva
2019-03-20 21:05   ` Richard Weinberger
2019-03-20 21:23     ` Gustavo A. R. Silva
2019-03-20 23:25       ` Richard Weinberger
2019-03-20 23:36         ` Gustavo A. R. Silva
2019-04-10 21:16   ` Gustavo A. R. Silva
2019-04-15  8:44     ` Miquel Raynal
2019-04-15 12:57       ` Gustavo A. R. Silva
2019-04-16 17:24         ` Miquel Raynal
2019-04-16 20:49           ` Gustavo A. R. Silva
2019-05-07 14:54             ` Gustavo A. R. Silva
2019-05-07 15:49               ` Richard Weinberger [this message]
2019-05-07 15:59                 ` Gustavo A. R. Silva
2019-05-09  6:53                   ` Miquel Raynal
2019-04-10 21:46 ` Kees Cook

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