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: 13675621 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 77993C25B7E for ; Mon, 27 May 2024 16:15:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id: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=aatA0b4EY8bazn5KfuCbvY2kPB8kjocr/DF9TGEYkGc=; b=QuKx9J65WICaW+ gQEfIxbwqy/I71MLOZHV4Hmnn2eaNmSZcHsxUq8DVuXlqBnqoQMFE0oB31a5NqITW8kSFs/jIQ68E tuaxDVbSM6zsI/Rm59bPdpd8Ej2bzj0Ft1Az292gWT16CszGK4fjv76dBc5mqNhWjw6IuVNZG5y2b +uGtSws9ahMFI/5Cjk7RYSg4CNbagdfvuma4pVlWfEhJQPMVEj8kyAYWsoAlM3zv4lWNlORpiBx3l cg9kENTxJNrldxMao7HNUgFl38y15HevGuM/qvPjgxXi6PHmDQi1N09vOaZKgR5aeA/f65JnqTid8 I5kf4L2pOkJA6rDj9sWA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBd0O-0000000Fmfz-1HFV; Mon, 27 May 2024 16:15:24 +0000 Received: from relay9-d.mail.gandi.net ([2001:4b98:dc4:8::229]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBd07-0000000FmTJ-1KFV for linux-arm-kernel@lists.infradead.org; Mon, 27 May 2024 16:15:09 +0000 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> 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-20240527_091507_824610_8EBA213C X-CRM114-Status: GOOD ( 13.02 ) 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); }