linux-kernel - Re: [PATCH v4 5/6] iio: accel: Prevent NULL pointer dereference in interrupt setup

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Message-ID: <aSWPnRBRdPS8vnir@smile.fi.intel.com>
Date: Tue, 25 Nov 2025 13:14:37 +0200
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: guptarud@...il.com, Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-iio@...r.kernel.org
Subject: Re: [PATCH v4 5/6] iio: accel: Prevent NULL pointer dereference in
 interrupt setup

On Tue, Nov 25, 2025 at 11:45:22AM +0100, Konrad Dybcio wrote:
> On 11/25/25 12:35 AM, Rudraksha Gupta via B4 Relay wrote:
> > 
> > The bmc150_accel_set_interrupt() function assumes that the interrupt
> > info is provided. However, when no IRQ is provided, the info pointer
> > remains NULL, leading to a kernel oops:
> 
> Hm, are you sure your device really doesn't have a pin connected to
> the IC's interrupt line?

I don't know the actual case here, but in general such a design occurred
in real life. So, shouldn't be a surprise to see another polling only mode
connection like this.

-- 
With Best Regards,
Andy Shevchenko