From: Linus Walleij <linusw@kernel.org>
To: Francesco Lavra <flavra@baylibre.com>
Cc: "Maksim Kiselev" <bigunclemax@gmail.com>,
"Sander Vanheule" <sander@svanheule.net>,
"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Mike Looijmans" <mike.looijmans@topic.nl>,
"Dmitry Mastykin" <mastichi@gmail.com>,
"Evgenii Shatokhin" <e.shatokhin@yadro.com>,
"Arturas Moskvinas" <arturas.moskvinas@gmail.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Andreas Kaessens" <akaessens@gmail.com>,
"Radim Pavlik" <radim.pavlik@tbs-biometrics.com>,
"Thomas Preston" <thomas.preston@codethink.co.uk>,
linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] pinctrl: mcp23s08: Disable all pin interrupts during probe
Date: Tue, 7 Apr 2026 11:30:50 +0200 [thread overview]
Message-ID: <CAD++jLmqz8PfJsfmS4N=K_OcwHmXz7cg066GMqPR+a7ACjb=eQ@mail.gmail.com> (raw)
In-Reply-To: <e66a4241ad77859921a4562dec17ab932cfd79b0.camel@baylibre.com>
On Tue, Apr 7, 2026 at 9:50 AM Francesco Lavra <flavra@baylibre.com> wrote:
> On Tue, 2026-04-07 at 08:58 +0200, Linus Walleij wrote:
> > On Mon, Mar 30, 2026 at 6:19 PM Francesco Lavra <flavra@baylibre.com>
> > wrote:
> >
>
> ....
>
> > > This issue has always been present, but has been latent until commit
> > > "f9f4fda15e72" ("pinctrl: mcp23s08: init reg_defaults from HW at probe
> > > and
> > > switch cache type"), which correctly removed reg_defaults from the
> > > regmap
> > > and as a side effect changed the behavior of the interrupt handler so
> > > that
> > > the real value of the MCP_GPINTEN register is now being read from the
> > > chip
> > > instead of using a bogus 0 default value; a non-zero value for this
> > > register can trigger the invocation of a nested handler which may not
> > > exist
> > > (yet).
> > > Fix this issue by disabling all pin interrupts during initialization.
> > >
> > > Fixes: "f9f4fda15e72" ("pinctrl: mcp23s08: init reg_defaults from HW at
> > > probe and switch cache type")
>
> I realized I put stray double quotes around the commit hash.
I fixed it up, no problems!
Yours,
Linus Walleij
next prev parent reply other threads:[~2026-04-07 9:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-30 16:19 [PATCH] pinctrl: mcp23s08: Disable all pin interrupts during probe Francesco Lavra
2026-04-07 6:58 ` Linus Walleij
2026-04-07 7:50 ` Francesco Lavra
2026-04-07 9:30 ` Linus Walleij [this message]
2026-04-07 13:47 ` Andy Shevchenko
2026-04-07 10:17 ` Mike Looijmans
2026-04-07 12:59 ` Francesco Lavra
2026-04-07 13:44 ` Mike Looijmans
2026-04-07 22:21 ` Uwe Kleine-König
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