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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Marek Vasut <marex@denx.de>
Cc: Francesco Dolcini <francesco@dolcini.it>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	linux-mtd@lists.infradead.org,
	Francesco Dolcini <francesco.dolcini@toradex.com>,
	Shawn Guo <shawnguo@kernel.org>,
	linux-arm-kernel@lists.infradead.org, stable@vger.kernel.org,
	u-boot@lists.denx.de
Subject: Re: [PATCH v1] mtd: parsers: ofpart: Fix parsing when size-cells is 0
Date: Thu, 5 Jan 2023 16:03:05 +0100	[thread overview]
Message-ID: <20230105160305.5b08f3e1@xps-13> (raw)
In-Reply-To: <f689c22c-dd93-8143-c730-2af4d472bd0f@denx.de>


marex@denx.de wrote on Thu, 5 Jan 2023 15:51:10 +0100:

> On 1/5/23 13:47, Francesco Dolcini wrote:
> > Hello Miquel,  
> 
> Hi,
> 
> [...]
> 
> >> Let's move forward with this. Let's assume my fears are baseless. We
> >> might consider the situation where someone tries to hide the partitions
> >> by setting #size-cell to 0 even wronger and too unlikely. Hopefully we
> >> will not break any other existing setups by applying an always-on fix.  
> > 
> > Nice, good!  
> 
> Indeed
> 
> >> I would still like to see U-Boot partitions handling evolve, at least:
> >> - fix #size-cells in fdt_fixup_mtd()
> >> - avoid the fdt_fixup_mtd() call from Collibri boards (ie. an example
> >>    that can be followed by the other users)  
> > 
> > Fine, I can do it.
> > 
> > However I am just not 100% sure about your proposal, I wonder if we
> > should just deprecate this function or we should fix it.  
> 
> I would say fix it.

Well, I think these are two orthogonal changes. The function should be
deprecated *and* fixed for the existing users?

> > The exact end result will depend on the discussion with the U-Boot
> > folks, but I absolutely agree that the current situation needs to
> > change. I'll keep you in CC on those patches.
> >   
> >> On Linux side let's fix #size-cells like you proposed without filtering
> >> against a list of compatibles. We however need to improve the
> >> heuristics:
> >> - Do it only when there are partitions declared within a NAND
> >>    controller node.
> >> - Change the warning to avoid mentioning backward compatibility, just
> >>    mention this is utterly wrong and thus the value will be set to 1
> >>    instead of 0.
> >> - Mention in the comment above this only works on systems with <4GiB
> >>    chips.
> >> If you think about other conditions please feel free to add them.
> >>
> >> Do you concur?  
> > Yes, I do agree.  
> 
> Same here, agreed, thanks.
> 
> [...]


Thanks,
Miquèl

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  reply	other threads:[~2023-01-05 21:02 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-02  7:19 [PATCH v1] mtd: parsers: ofpart: Fix parsing when size-cells is 0 Francesco Dolcini
2022-12-02  9:14 ` Miquel Raynal
2022-12-02 10:12   ` Francesco Dolcini
2022-12-02 10:24     ` Francesco Dolcini
2022-12-02 10:53       ` Miquel Raynal
2022-12-02 11:23         ` Francesco Dolcini
2022-12-02 14:05           ` Miquel Raynal
2022-12-02 14:31             ` Marek Vasut
2022-12-02 15:00               ` Miquel Raynal
2022-12-02 15:23                 ` Marek Vasut
2022-12-02 15:49                   ` Miquel Raynal
2022-12-02 16:01                     ` Miquel Raynal
2022-12-02 16:17                     ` Marek Vasut
2022-12-02 16:42                       ` Miquel Raynal
2022-12-02 16:52                         ` Marek Vasut
2022-12-02 16:57                           ` Miquel Raynal
2022-12-02 17:08                             ` Marek Vasut
2022-12-05 11:26                               ` Francesco Dolcini
2022-12-05 13:49                                 ` Miquel Raynal
2022-12-05 16:25                                   ` Marek Vasut
2022-12-15  7:16                                     ` Miquel Raynal
2022-12-15  7:45                                       ` Marek Vasut
2022-12-15  8:04                                         ` Miquel Raynal
2022-12-16  0:36                                           ` Marek Vasut
2022-12-16  7:52                                             ` Francesco Dolcini
2022-12-16  7:45                                       ` Francesco Dolcini
2022-12-16 10:46                                         ` Marek Vasut
2022-12-16 11:01                                           ` Miquel Raynal
2022-12-16 12:37                                             ` Francesco Dolcini
2022-12-16 13:37                                               ` Miquel Raynal
2022-12-16 14:32                                                 ` Marek Vasut
2022-12-16 15:35                                                   ` Miquel Raynal
2022-12-16 16:30                                                     ` Francesco Dolcini
2023-01-02  9:40                                                       ` Miquel Raynal
2023-01-05 11:33                                                         ` Miquel Raynal
2023-01-05 12:47                                                           ` Francesco Dolcini
2023-01-05 14:51                                                             ` Marek Vasut
2023-01-05 15:03                                                               ` Miquel Raynal [this message]
2022-12-02 17:20                         ` Francesco Dolcini
2022-12-05 11:30                           ` Francesco Dolcini
2022-12-05 15:28                             ` Miquel Raynal
2022-12-02 16:45                       ` Francesco Dolcini
2022-12-02 17:05                         ` Miquel Raynal
2022-12-02 15:56               ` Thorsten Leemhuis
2022-12-04 12:50                 ` Marek Vasut
2022-12-04 12:59                   ` Thorsten Leemhuis
2022-12-04 15:50                     ` Marek Vasut
2022-12-02 12:43 ` Greg KH

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