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Date: Sat, 28 Feb 2026 11:52:26 +0000
From: Jonathan Cameron <jic23@kernel.org>
To: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: Antoniu Miclaus <antoniu.miclaus@analog.com>, Lars-Peter Clausen
 <lars@metafoo.de>, Michael Hennerich <Michael.Hennerich@analog.com>, David
 Lechner <dlechner@baylibre.com>, Nuno =?UTF-8?B?U8Oh?=
 <nuno.sa@analog.com>, Andy Shevchenko <andy@kernel.org>,
 linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iio: adc: ade9000: move mutex init before IRQ
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On Sat, 28 Feb 2026 13:05:18 +0200
Andy Shevchenko <andriy.shevchenko@intel.com> wrote:

> On Fri, Feb 27, 2026 at 03:33:30PM +0200, Antoniu Miclaus wrote:
> > Move devm_mutex_init() before ade9000_request_irq() calls so that
> > st->lock is initialized before any handler that depends on it can run.  
> 
> Sounds good. The technique to reproduce this (in case you have a HWr
> to make sure probe runs) the kernel configuration should have
> CONFIG_DEBUG_SHIRQ=y (and in some cases a tweak in the code to flag
> IRQ as shared).
> 
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
> 
Applied as a fix, so I added a Fixes tag and +CC stable.

Whilst hard to hit it is is always good to ensure we are safe against
spurious interrupts.

thanks,

Jonathan