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Date: Mon, 24 Aug 2026 16:49:53 -0500
From: Rob Herring <robh@kernel.org>
To: zhaoguohan@kylinos.cn
Cc: Tomeu Vizoso <tomeu@tomeuvizoso.net>, dri-devel@lists.freedesktop.org,
	Oded Gabbay <ogabbay@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Frank Li <Frank.Li@nxp.com>, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Subject: Re: [PATCH] accel/ethosu: check MMIO mapping errors in probe
Message-ID: <20260824214953.GB50486-robh@kernel.org>
References: <20260716065219.931088-1-zhaoguohan@kylinos.cn>
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In-Reply-To: <20260716065219.931088-1-zhaoguohan@kylinos.cn>

On Thu, Jul 16, 2026 at 02:52:19PM +0800, zhaoguohan@kylinos.cn wrote:
> From: GuoHan Zhao <zhaoguohan@kylinos.cn>
> 
> devm_platform_ioremap_resource() returns an error pointer when the register
> resource cannot be mapped. ethosu_probe() stores it and continues until
> initialization dereferences it through MMIO accessors.
> 
> Return the mapping error before initializing the device.
> 
> Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: GuoHan Zhao <zhaoguohan@kylinos.cn>
> ---
>  drivers/accel/ethosu/ethosu_drv.c | 2 ++
>  1 file changed, 2 insertions(+)

Applied, thanks.

Rob