From patchwork Mon May 27 16:14:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13675581 X-Patchwork-Delegate: bhelgaas@google.com Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3D1C6167291; Mon, 27 May 2024 16:15:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.199 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716826510; cv=none; b=JaaW2OZ4OBAp4r2Z4CiWBz8oUIZcPLk23iBp2vLI/qygpxwxZm/yS4/Q18tcRRqZoqGYk70pMGq7KpRDEiNx4eNdfMamA5vpCKRqL5VQIM72ce9QCvDQxufHY2Irmp8yLK8t27chc4Hl8hyF3ZT9ZwzFBC/WJ0Ea+2LW0NCxBAg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716826510; c=relaxed/simple; bh=E2Nmsu/7HYQLnn0sN5b1S2heBsMjF3oRWqAoBIGaDBE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=XV8ZAf7CZVIDpobj8Ji6/XJ6Ov3FQV1zEzO346gEmDuNBMaYH7XGE0DqREUfqr3INap07sGs5ny1nRAenGadXYV/aT86NqnILY/AOFNSnYg1w9rIa4SIb4mOxnLm3ZDlnH/+G8XKR/e00NHyyZpE9SOEoJPVHRgiuWuYTIzPf5s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=EengVC3r; arc=none smtp.client-ip=217.70.183.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="EengVC3r" Received: by mail.gandi.net (Postfix) with ESMTPA id E54D5FF810; Mon, 27 May 2024 16:15:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1716826505; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=bOAN8DOKAutpcJ98IdSxdr6GKYFYp22/ixh21amGeTg=; b=EengVC3rkV2AdgX2gUMxvuPJrkjrG9Id9BGc2TzsDfOh9F9xdVgWDv7UaVJztjDqCVoZTa KlGs1D+C8gveTFGS1Dn7nYjiR+WS+GlxfpSazJxn8Uy8QgbcACVwbZ7xDBymiBlFk6UG4D 4jjuKtCigVm/JuJ9mSlrx9euQ5TyAXK93RvGrUwa4FbvBahFUGbIt1id8TecYs9kKirod2 dSfgpdAzePZG8UOgAxH3RLpxWOvMoQcu8ttprKDI23osJb8s2z4xkvl+lAcdgAithHghe0 1JUCFiZgfvMp6eRZDamI9S69eDFVHXSWRBsij5GN7su9cWMuhV55MN+VSg0sRA== From: Herve Codina To: Simon Horman , Sai Krishna Gajula , Herve Codina , Thomas Gleixner , Rob Herring , Krzysztof Kozlowski , Conor Dooley , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Lee Jones , Arnd Bergmann , Horatiu Vultur , UNGLinuxDriver@microchip.com, Andrew Lunn , Heiner Kallweit , Russell King , Saravana Kannan , Bjorn Helgaas , Philipp Zabel , Lars Povlsen , Steen Hegelund , Daniel Machon , Alexandre Belloni Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Allan Nielsen , Steen Hegelund , Luca Ceresoli , Thomas Petazzoni , =?utf-8?b?Q2zDqW1lbnQgTMOp?= =?utf-8?b?Z2Vy?= Subject: [PATCH v2 04/19] reset: core: add get_device()/put_device on rcdev Date: Mon, 27 May 2024 18:14:31 +0200 Message-ID: <20240527161450.326615-5-herve.codina@bootlin.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240527161450.326615-1-herve.codina@bootlin.com> References: <20240527161450.326615-1-herve.codina@bootlin.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com From: Clément Léger Since the rcdev structure is allocated by the reset controller drivers themselves, they need to exists as long as there is a consumer. A call to module_get() is already existing but that does not work when using device-tree overlays. In order to guarantee that the underlying reset controller device does not vanish while using it, add a get_device() call when retrieving a reset control from a reset controller device and a put_device() when releasing that control. Signed-off-by: Clément Léger Signed-off-by: Herve Codina --- drivers/reset/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/reset/core.c b/drivers/reset/core.c index dba74e857be6..999c3c41cf21 100644 --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -812,6 +812,7 @@ __reset_control_get_internal(struct reset_controller_dev *rcdev, kref_init(&rstc->refcnt); rstc->acquired = acquired; rstc->shared = shared; + get_device(rcdev->dev); return rstc; } @@ -826,6 +827,7 @@ static void __reset_control_release(struct kref *kref) module_put(rstc->rcdev->owner); list_del(&rstc->list); + put_device(rstc->rcdev->dev); kfree(rstc); }