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: 13714182 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B4B11C2BD09 for ; Thu, 27 Jun 2024 10:52:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=bOAN8DOKAutpcJ98IdSxdr6GKYFYp22/ixh21amGeTg=; b=Ji55WKBiiUbP9r1NBB/vzMFcnL CDVrId44z5nwj4In9cbznlrrHNqvU7CBgeOCltNX3G7QA9Relb06gURx2xEZJ0hmqLai4lc0qBIcg gqMIeMUFQgSgbAy8hHrctvvG0kI2vgrO0yndVoMWlLkQiS2dacOyzUx5gCZmNImtTTQqjAKcO78WK u2FJOqhgu81TLEisRK1+uqlej8rveGU2uWGXecwAjZyFQSp9HSFjD/DiIOVbaJZJQez/MyhTHmyN4 HOY41j3hqvoNM/dj/T4D8jn4JG2L6Rg5YgigFUFXBWhj1vigoeRx9s2y1Qzi/0GQPTB59ih8R/990 asf1aFCQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sMmjD-0000000A2yk-2lV9; Thu, 27 Jun 2024 10:51:48 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sMmj1-0000000A2up-3Ict for linux-arm-kernel@bombadil.infradead.org; Thu, 27 Jun 2024 10:51:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:Content-Type :MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=bOAN8DOKAutpcJ98IdSxdr6GKYFYp22/ixh21amGeTg=; b=JXDsRoOuDQ3LkVay+p1lt154k8 AyxNMh84sG1kMihYj1mA03ud1ym6Ru5adqHXhI2ViLTGE5J9nkt4EAmaUl8Bxx4cczKiO0+TGrK/g 4koXd2NAma1Y8O2yw1F2Emx2H+AYa3reYYF2HD35Qmg3nS+3ak4smPsXIcTSjAboQcETsJP38qjCv IqvVvvMPHXpy9KQCaFXRwwu3nVUAM3v2bn1OM9QFXYrh+UvjKQZDOeLqXqYW4j3krqJUFs9fjQiQr iW3zSHdo7FXAeEWVO6JPuMRLTyvEKQcpEnIJgw97JTNfJ5LD10ZNhS2Z15k4POpoMJ70nnmJ4BJQ+ pcjuG5jg==; Received: from relay7-d.mail.gandi.net ([2001:4b98:dc4:8::227]) by desiato.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sMlAw-00000008mkq-2OhF for linux-arm-kernel@lists.infradead.org; Thu, 27 Jun 2024 09:12:22 +0000 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> MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240627_101220_616881_B876C527 X-CRM114-Status: GOOD ( 11.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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); }