DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 25562606A323
From: Gu Bin <gubin@cmss.chinamobile.com>
To: sean.wang@mediatek.com,
	olivia@selenic.com,
	herbert@gondor.apana.org.au
Cc: matthias.bgg@gmail.com,
	angelogioacchino.delregno@collabora.com,
	linux-crypto@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/2] hwrng: mtk - runtime PM fixes
Date: Wed, 11 Nov 2026 17:06:57 +0800
Message-ID: <20261111090704.1699-1-gubin@cmss.chinamobile.com>
In-Reply-To: <20261111073237.1647-1-gubin@cmss.chinamobile.com>
References: <20261111073237.1647-1-gubin@cmss.chinamobile.com>
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The sashiko review of v1 pointed out a pre-existing ordering problem:
mtk_rng_probe() registers the RNG before enabling runtime PM, so
mtk_rng_read() can run while runtime PM is disabled - both in the
probe window (hwrng_register() starts the fillfn kthread right away)
and on unbind (the devres teardown disables runtime PM before the RNG
is unregistered). Patch 2 moves the drvdata assignment and the
runtime PM setup above the registration, which closes both windows.
Patch 1 is unchanged.

Gu Bin (2):
  hwrng: mtk - use pm_runtime_resume_and_get() in mtk_rng_read()
  hwrng: mtk - enable runtime PM before registering the RNG

 drivers/char/hw_random/mtk-rng.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

-- 
2.55.0.windows.3