Re: [PATCH] pinctrl: mcp23s08: Disable all pin interrupts during probe

[Andy Shevchenko]

On Tue, Apr 07, 2026 at 09:50:39AM +0200, Francesco Lavra 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@xxxxxxxxxxxx>
> > 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.

Also you put way too many lines of backtrace. Submitting Patches recommends to
leave ~3-5 lines only (the one that bring value).

> > > Signed-off-by: Francesco Lavra <flavra@xxxxxxxxxxxx>

-- 
With Best Regards,
Andy Shevchenko