From: Brian Norris <computersforpeace@gmail.com>
To: Michal Suchanek <hramrach@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
David Woodhouse <dwmw2@infradead.org>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mtd@lists.infradead.org
Subject: Re: [PATCH v3 2/5] mtd: mtdpart: Do not fail mtd probe when parsing partitions fails.
Date: Mon, 26 Oct 2015 18:44:48 -0700 [thread overview]
Message-ID: <20151027014448.GN13239@google.com> (raw)
In-Reply-To: <20151011200347.GD3696@localhost>
On Sun, Oct 11, 2015 at 01:03:47PM -0700, Brian Norris wrote:
> All in all, I think my suggestions would look something like the
> following alternative patch. I haven't tested it yet.
>
> Brian
>
> (git-format-patch pasted below)
>
> From 53b60f31a2a0f2a7e8220a4aff47457248bccbcf Mon Sep 17 00:00:00 2001
> From: Brian Norris <computersforpeace@gmail.com>
> Date: Sun, 11 Oct 2015 10:25:23 -0700
> Subject: [PATCH] mtd: mtdpart: Do not fail mtd probe when parsing partitions
> fails.
>
> Due to wrong assumption in ofpart ofpart fails on Exynos on SPI chips
> with no partitions because the subnode containing controller data
> confuses the ofpart parser.
>
> Thus compiling in ofpart support automatically fails probing any SPI NOR
> flash without partitions on Exynos.
>
> Compiling in a partitioning scheme should not cause probe of otherwise
> valid device to fail.
>
> Instead, let's do the following:
> * try parsers until one succeeds
> * if no parser succeeds, report the first error we saw
> * even in the failure case, allow MTD to probe, with fallback
> partitions or no partitions at all -- the master device will still be
> registered
>
> Issue report and comments initially by Michal Suchanek.
>
> Reported-by: Michal Suchanek <hramrach@gmail.com>
> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
> ---
> drivers/mtd/mtdcore.c | 6 ++++--
> drivers/mtd/mtdpart.c | 14 ++++++++++----
> 2 files changed, 14 insertions(+), 6 deletions(-)
Tested, and applied this version to l2-mtd.git
next prev parent reply other threads:[~2015-10-27 1:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1439911625.git.hramrach@gmail.com>
[not found] ` <5b636f504e32c9fe83df22694656075f4f45c710.1439911625.git.hramrach@gmail.com>
2015-10-11 20:00 ` [PATCH v3 1/5] mtd: mtdpart: add debug prints to partition parser Brian Norris
[not found] ` <97366073dfe93b478f24e2fc30ca818326906e0a.1439911625.git.hramrach@gmail.com>
2015-10-11 20:03 ` [PATCH v3 2/5] mtd: mtdpart: Do not fail mtd probe when parsing partitions fails Brian Norris
2015-10-27 1:44 ` Brian Norris [this message]
[not found] ` <e47db0c8eeaeb11353bcb2f4dcd138e813c3ecd7.1439911625.git.hramrach@gmail.com>
2015-10-11 20:04 ` [PATCH v3 3/5] mtd: ofpart: update devicetree binding specification Brian Norris
2015-10-27 2:01 ` Brian Norris
2015-10-27 4:35 ` Rob Herring
2015-10-27 22:50 ` Brian Norris
2015-10-28 0:45 ` Rob Herring
[not found] ` <83fbf31ad895446837f8e01f77a1ff7c63d62251.1439911625.git.hramrach@gmail.com>
2015-10-11 20:04 ` [PATCH v3 4/5] mtd: ofpart: document the lock flag Brian Norris
2015-10-27 1:47 ` Brian Norris
[not found] ` <78e45e51c94899f92ec5d189846c5dd5cf9d8f7a.1439911625.git.hramrach@gmail.com>
2015-10-31 0:21 ` [PATCH v3 5/5] mtd: ofpart: move ofpart partitions to a dedicated dt node Brian Norris
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