From patchwork Thu Jun 27 09:11:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13714020 X-Patchwork-Delegate: bhelgaas@google.com Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [217.70.183.200]) (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 8A0D813B780; Thu, 27 Jun 2024 09:12:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.200 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719479541; cv=none; b=F50SHkxwiFYNCHXPiklLLRQ8n0twF7JaS0tQw8rTmvod/861NWWDlxWa5KOzP+VHOcsj9qb/7hwxuK0KeyupestQZY0tBMp+wPLWx6EJDNiLK/iYaPHwN6EPIxJAQAZeVl839J0PQJtLMvoIeWEPpG8TKl0w8g5xzDOuNG9onx4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719479541; c=relaxed/simple; bh=E2Nmsu/7HYQLnn0sN5b1S2heBsMjF3oRWqAoBIGaDBE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=VA97XT3/2zMcCEQ/oG8xTnHmHVS7zNEWH507/Xry5AfaR4N/VqxjwhvPnrNGz/YBfMICKomiOi0088oQiaBhCMPkvyfzb1PIrAAH2GYdy+I43NwEQvos4QSh5IUjVKzCuZsOYO8Fz4JturmU5Nn+Iem530Jx7/KG+UGwO5WJhgI= 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=BLFoZXTU; arc=none smtp.client-ip=217.70.183.200 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="BLFoZXTU" Received: by mail.gandi.net (Postfix) with ESMTPA id 8F62B20005; Thu, 27 Jun 2024 09:12:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1719479538; 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=BLFoZXTUyOahcb22V3K5FvkqRw9RWqaUUM+SECzMK0lB6eCEOiT4uNzzDgA2xwMjwrYCM/ y0fZyBJz6gHkEzOnnpAcpN3dBYwcRdYmEbkBks85SaJLq1ncqugOfHIraS4FD1FcZt7z3z 7BXpS8PeWyiWnFfbQDspOtLfOVIDR5mDZylVVvv9zHgywwy9sh7UP+aHrSggC6YIYwqa2R 7hhY4yY3VlY5u8VHn75u9Vw9eR1x5fdM+jSAmmpP8ovdIQL4rDJr6aZwvDW5AUOlPI7avz mumzb8X+JJ2mykvehqYTKw/6JZ9NBUvDJG87BChGeV4pDrn6WtV6ApdwI74ikQ== From: Herve Codina To: Andy Shevchenko , Simon Horman , Herve Codina , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones , Arnd Bergmann , UNGLinuxDriver@microchip.com, Saravana Kannan , Bjorn Helgaas , Philipp Zabel , Lars Povlsen , Steen Hegelund , Daniel Machon Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Horatiu Vultur , Andrew Lunn , 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 v3 4/7] reset: core: add get_device()/put_device on rcdev Date: Thu, 27 Jun 2024 11:11:33 +0200 Message-ID: <20240627091137.370572-5-herve.codina@bootlin.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240627091137.370572-1-herve.codina@bootlin.com> References: <20240627091137.370572-1-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); }