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From: ron minnich <rminnich@gmail.com>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Richard Weinberger <richard@nod.at>,
	linux-mtd@lists.infradead.org,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: [PATCH 1/1] mtd/intel-spi: Support cmdline-based partition
Date: Fri, 27 Mar 2020 16:53:28 -0700
Message-ID: <CAP6exY+p-Chi2R4Y1H8UvcbE6rvEpMiK3UaX2OyBq=ZO6uULpg@mail.gmail.com> (raw)
In-Reply-To: <CAP6exYJWWT2SFLjPCdjAEEjmZYwqYuTxd_aRaf=xEELmXqfMpA@mail.gmail.com>

OK, I've done a quick prototype of using () as one way to specify the
ID. The mtparts can look like this (tested)

mtdparts=(0000:00:1f.5)25165824(BIOS),-(squashfs)

The text in () can be pretty arbitrary; only ) is disallowed.
It's about 10 more lines of code in cmdlinepart.c and that's it.
Further, the existing syntax is still supported:
mtdparts=id:parts

what do you think?

thanks

ron

On Fri, Mar 27, 2020 at 10:39 AM ron minnich <rminnich@gmail.com> wrote:
>
> yeah, :: is not so bad, but you've got a lot of corner cases as you check for ::
> mtdparts=0:
> for one example.
>
> Covering all the ways things can go wrong gets messy. You can pretty
> much guarantee all those corner cases will get exercised ...
>
> And people are going to mess this up and end up with hard to debug errors:
> mtdparts=0000::0:1f.3:parts
>
> That could be a hard error to spot.
>
> I still wonder if we should not just define some character as
> available in addition to :. I realize | was pretty awful, but ... is
> there some other character we might use? I kind of like the simplicity
> of the current scheme; there really would be no issue had it been
> almost anything but a : :-)
>
> But if the sense is that :: is the way to go, I can give it a shot.
>
> ron
>
> On Fri, Mar 27, 2020 at 10:16 AM Mika Westerberg
> <mika.westerberg@linux.intel.com> wrote:
> >
> > On Fri, Mar 27, 2020 at 10:05:52AM -0700, ron minnich wrote:
> > > I did try the \ thing but found it a bit tricky to work with, with
> > > lots of potential for simple errors.
> > >
> > > It would require cmdlines like this
> > > mtdparts=0000\:00\:0.1f:etcetc
> > >
> > > A lot of these mtdparts definitions are produced by scripts and
> > > Makefiles and there are many, many places where \\ have a way of
> > > vanishing.
> >
> > Right. One option would be to use the printf() style escaping and make
> > :: to be literal : in the same way %% is literal %.

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Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 19:58 ron minnich
2020-03-23 23:19 ` ron minnich
2020-03-25 17:34   ` ron minnich
2020-03-25 17:34     ` ron minnich
2020-03-27 15:48       ` ron minnich
2020-03-27 15:56         ` Mika Westerberg
2020-03-27 16:19           ` Miquel Raynal
2020-03-27 16:48             ` Mika Westerberg
2020-03-27 16:52               ` Miquel Raynal
2020-03-27 17:05                 ` ron minnich
2020-03-27 17:16                   ` Mika Westerberg
2020-03-27 17:39                     ` ron minnich
2020-03-27 23:53                       ` ron minnich [this message]
2020-03-30  6:08                         ` Mika Westerberg
2020-03-30  7:27                           ` Miquel Raynal
2020-03-30 15:53                             ` ron minnich
2020-04-01  7:41                               ` Miquel Raynal
2020-04-01 15:42                                 ` ron minnich
2020-04-01 19:49                                   ` ron minnich
2020-04-27  9:16                                 ` Boris Brezillon
2020-04-27  9:49                                   ` Boris Brezillon
2020-04-27 14:41                                     ` Miquel Raynal
2020-04-27 18:48                                       ` ron minnich
2020-04-27 18:50                                         ` ron minnich
2020-04-27 18:56                                           ` Miquel Raynal
2020-04-27 18:59                                             ` ron minnich
2020-04-27 19:21                                             ` Boris Brezillon
2020-04-27 19:31                                               ` ron minnich
2020-04-27 20:31                                     ` ron minnich
2020-04-27 21:20                                       ` Miquel Raynal
2020-03-27 16:53             ` ron minnich
2020-03-27 16:15         ` Miquel Raynal

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