From: "Théo Lebrun" <theo.lebrun@bootlin.com>
To: "Linus Walleij" <linus.walleij@linaro.org>
Cc: "Bartosz Golaszewski" <brgl@bgdev.pl>,
"Rob Herring" <robh+dt@kernel.org>,
"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Philipp Zabel" <p.zabel@pengutronix.de>,
"Thomas Bogendoerfer" <tsbogend@alpha.franken.de>,
<linux-gpio@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mips@vger.kernel.org>,
"Gregory CLEMENT" <gregory.clement@bootlin.com>,
"Vladimir Kondratiev" <vladimir.kondratiev@mobileye.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Tawfik Bayouk" <tawfik.bayouk@mobileye.com>
Subject: Re: [PATCH 18/23] gpio: nomadik: support mobileye,eyeq5-gpio
Date: Thu, 22 Feb 2024 10:37:18 +0100 [thread overview]
Message-ID: <CZBI90SFODAR.TZ3L2XO2F8IF@bootlin.com> (raw)
In-Reply-To: <CACRpkdZQ9LEqKvugDCMEXPPLMCUJ-f9rYQOpmsSEJhtW0zjNsg@mail.gmail.com>
Hello,
On Wed Feb 21, 2024 at 8:36 PM CET, Linus Walleij wrote:
> On Wed, Feb 21, 2024 at 5:16 PM Théo Lebrun <theo.lebrun@bootlin.com> wrote:
>
> > > Trying to figure it out...
> >
> > Can I help in the debugging process?
>
> Nah, I found it :)
>
> > Reading the code once again I'd guess
> > of_device_get_match_data(&gpio_pdev->dev) could be the root cause. We
> > are accessing match data for the GPIO device while probing the pinctrl
> > device. Maybe something isn't initialised properly yet? The rest looks
> > rather harmless, I've checked all conditional expressions.
>
> Yep spot on. The nmk_gpio_populate_chip() is sometimes called from
> the pinctrl driver before the gpio probe() has been called, so the match
> data is NULL and we crash.
>
> This looks like it does for historical reasons and there could be better
> ways to fix it now that Saravana Kannan has fixed up the probe ordering
> code.
>
> The following is one way to fix it for now using device_is_compatible()
> (illustrating some other changes I did as well):
Thanks for the debugging and the proposed fix. Indeed matching on
compatible to avoid match data for a bool makes sense.
Thanks,
--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2024-02-22 9:37 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-14 16:23 [PATCH 00/23] Rework Nomadik GPIO to add Mobileye EyeQ5 support Théo Lebrun
2024-02-14 16:23 ` [PATCH 01/23] dt-bindings: gpio: nomadik: convert into yaml format Théo Lebrun
2024-02-15 9:11 ` Krzysztof Kozlowski
2024-02-15 9:47 ` Théo Lebrun
2024-02-19 14:50 ` Linus Walleij
2024-02-14 16:23 ` [PATCH 02/23] dt-bindings: gpio: nomadik: add optional ngpios property Théo Lebrun
2024-02-15 9:12 ` Krzysztof Kozlowski
2024-02-19 14:50 ` Linus Walleij
2024-02-19 14:55 ` Théo Lebrun
2024-02-14 16:23 ` [PATCH 03/23] dt-bindings: gpio: nomadik: add mobileye,eyeq5-gpio compatible Théo Lebrun
2024-02-15 9:13 ` Krzysztof Kozlowski
2024-02-15 9:52 ` Théo Lebrun
2024-02-14 16:23 ` [PATCH 04/23] dt-bindings: gpio: nomadik: add optional reset property Théo Lebrun
2024-02-15 9:13 ` Krzysztof Kozlowski
2024-02-19 14:55 ` Linus Walleij
2024-02-14 16:23 ` [PATCH 05/23] gpio: nomadik: extract GPIO platform driver from drivers/pinctrl/nomadik/ Théo Lebrun
2024-02-15 10:03 ` Philipp Zabel
2024-02-16 10:43 ` Théo Lebrun
2024-02-19 15:33 ` Bartosz Golaszewski
2024-02-21 11:41 ` Philipp Zabel
2024-02-19 16:08 ` Bartosz Golaszewski
2024-02-21 16:02 ` Théo Lebrun
2024-02-21 14:37 ` Linus Walleij
2024-02-21 16:20 ` Théo Lebrun
2024-02-21 19:31 ` Linus Walleij
2024-02-14 16:23 ` [PATCH 06/23] pinctrl: nomadik: fix build warning (-Wformat) Théo Lebrun
2024-02-14 16:24 ` [PATCH 07/23] pinctrl: nomadik: fix build warning (-Wpointer-to-int-cast) Théo Lebrun
2024-02-14 16:24 ` [PATCH 08/23] pinctrl: nomadik: minimise indentation in probe Théo Lebrun
2024-02-14 16:24 ` [PATCH 09/23] pinctrl: nomadik: follow type-system kernel coding conventions Théo Lebrun
2024-02-14 16:24 ` [PATCH 10/23] pinctrl: nomadik: follow whitespace " Théo Lebrun
2024-02-14 16:24 ` [PATCH 11/23] pinctrl: nomadik: follow conditional " Théo Lebrun
2024-02-14 16:24 ` [PATCH 12/23] gpio: nomadik: request dynamic ID allocation Théo Lebrun
2024-02-14 16:24 ` [PATCH 13/23] gpio: nomadik: fix offset bug in nmk_pmx_set() Théo Lebrun
2024-02-19 15:54 ` Bartosz Golaszewski
2024-02-21 15:57 ` Théo Lebrun
2024-02-19 21:56 ` Linus Walleij
2024-02-21 16:05 ` Théo Lebrun
2024-02-14 16:24 ` [PATCH 14/23] gpio: nomadik: make clock optional Théo Lebrun
2024-02-14 16:24 ` [PATCH 15/23] gpio: nomadik: change driver name from gpio to gpio-nomadik Théo Lebrun
2024-02-14 16:24 ` [PATCH 16/23] gpio: nomadik: support shared GPIO IRQs Théo Lebrun
2024-02-19 15:48 ` Bartosz Golaszewski
2024-02-19 15:54 ` Théo Lebrun
2024-02-19 16:17 ` Bartosz Golaszewski
2024-02-20 8:07 ` Linus Walleij
2024-02-14 16:24 ` [PATCH 17/23] gpio: nomadik: handle variadic GPIO count Théo Lebrun
2024-02-19 16:17 ` Bartosz Golaszewski
2024-02-20 8:08 ` Linus Walleij
2024-02-14 16:24 ` [PATCH 18/23] gpio: nomadik: support mobileye,eyeq5-gpio Théo Lebrun
2024-02-21 13:45 ` Linus Walleij
2024-02-21 16:22 ` Théo Lebrun
2024-02-21 14:31 ` Linus Walleij
2024-02-21 16:16 ` Théo Lebrun
2024-02-21 19:36 ` Linus Walleij
2024-02-22 9:37 ` Théo Lebrun [this message]
2024-02-14 16:24 ` [PATCH 19/23] gpio: nomadik: grab optional reset control and deassert it at probe Théo Lebrun
2024-02-15 10:19 ` Philipp Zabel
2024-02-16 10:46 ` Théo Lebrun
2024-02-14 16:24 ` [PATCH 20/23] MIPS: eyeq5_defconfig: enable GPIO by default Théo Lebrun
2024-02-14 16:24 ` [PATCH 21/23] MIPS: mobileye: eyeq5: add two GPIO bank nodes Théo Lebrun
2024-02-14 16:24 ` [PATCH 22/23] MIPS: mobileye: eyeq5: add resets to GPIO banks Théo Lebrun
2024-02-14 16:24 ` [PATCH 23/23] MIPS: mobileye: eyeq5: map GPIOs to pins using gpio-ranges Théo Lebrun
2024-02-19 15:44 ` [PATCH 00/23] Rework Nomadik GPIO to add Mobileye EyeQ5 support Bartosz Golaszewski
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