linux-kernel - Re: [PATCH] firmware: meson_sm: fix device leak at probe

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Message-ID: <CAFBinCALsUdn3fGh2e9qys4KKKT=mDnx5vtkyEz-ZGRmgvNs0A@mail.gmail.com>
Date: Sat, 2 Aug 2025 12:02:05 +0200
From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To: Johan Hovold <johan@...nel.org>
Cc: Neil Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>, 
	Jerome Brunet <jbrunet@...libre.com>, Carlo Caione <ccaione@...libre.com>, 
	linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	stable@...r.kernel.org
Subject: Re: [PATCH] firmware: meson_sm: fix device leak at probe

On Fri, Jul 25, 2025 at 9:41 AM Johan Hovold <johan@...nel.org> wrote:
>
> Make sure to drop the reference to the secure monitor device taken by
> of_find_device_by_node() when looking up its driver data on behalf of
> other drivers (e.g. during probe).
>
> Note that holding a reference to the platform device does not prevent
> its driver data from going away so there is no point in keeping the
> reference after the helper returns.
>
> Fixes: 8cde3c2153e8 ("firmware: meson_sm: Rework driver as a proper platform driver")
> Cc: stable@...r.kernel.org      # 5.5
> Cc: Carlo Caione <ccaione@...libre.com>
> Signed-off-by: Johan Hovold <johan@...nel.org>
Acked-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>