From patchwork Mon Aug 5 10:17:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13753436 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 A139BC3DA7F for ; Mon, 5 Aug 2024 10:23:55 +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=s1fCMRN4ClgmrBHP4iydfCyYwO lDba4s8m/6upOH0OYOSPeEaiN0tdN8gUiDZnkSbwNOtRSOFf/3rpYQYcuEqc7oyZ3Evy6/Xb51aEP MMOkHKB/6YUX1XkVfEMqWi6c+Rz1iUG2MwzcxqobWowGqowi16Xlcg8bBfXeH1VJlm0o31u3ztB9z zeS0X0/rgxqZbuhud/ijHHPvU6LTxe/6bcyoej5R+8ftFOr+msUaCnYYH3JokAgeNtK3R9PrcG+Xc Pvk0uwQ0ffIXD4FTTMzb4Anf6bdlzzAtMezaOT9sNVoDl3j0uiewMoP0KEM/W6ykPLEYlwyR2pH5i kPDisDuw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sausV-0000000FUG6-0Fzf; Mon, 05 Aug 2024 10:23:47 +0000 Received: from relay7-d.mail.gandi.net ([2001:4b98:dc4:8::227]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sauol-0000000FSoM-1PkU for linux-arm-kernel@lists.infradead.org; Mon, 05 Aug 2024 10:19:56 +0000 Received: by mail.gandi.net (Postfix) with ESMTPA id 5A9492000B; Mon, 5 Aug 2024 10:19:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1722853193; 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=FmPzDGpc7scj8oA7ISfmM92KJIu4sVZjIWTGr6KvniUx49FP2Sb0JRQ30YAZMQLKswMTms SmrItLYKJg2+7amIq9bjY6RD29fRWGOtcxgccW//T7YklvExojnAahtWNtBiQeddHl9xa4 dtwQ1+lSZByeArSMYGTk6tE/z5q4W1dB1Pku7j7U2nTvDRKQaSs/ydDZa5CzYbK7hxQp0V qyghmpR9AB8BxY++7cQfg6gjIVRDHmNssMDVS8Fx6gYi295jL59lDb0mIWl5+ltVwkpUMO QjwyKvEyYhZ5n2poV1Q9hr+yeZQV7yHFACR7EhIRIgUdjzr0BdR18det4xUAXA== From: Herve Codina To: Geert Uytterhoeven , Andy Shevchenko , Simon Horman , Lee Jones , Arnd Bergmann , Derek Kiernan , Dragan Cvetic , Greg Kroah-Hartman , Herve Codina , Bjorn Helgaas , Philipp Zabel , Lars Povlsen , Steen Hegelund , Daniel Machon , UNGLinuxDriver@microchip.com, Rob Herring , Saravana Kannan Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Horatiu Vultur , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Allan Nielsen , Steen Hegelund , Luca Ceresoli , Thomas Petazzoni , =?utf-8?b?Q2zDqW1lbnQgTMOp?= =?utf-8?b?Z2Vy?= Subject: [PATCH v4 7/8] reset: core: add get_device()/put_device on rcdev Date: Mon, 5 Aug 2024 12:17:23 +0200 Message-ID: <20240805101725.93947-8-herve.codina@bootlin.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240805101725.93947-1-herve.codina@bootlin.com> References: <20240805101725.93947-1-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-20240805_031955_548816_DC51A112 X-CRM114-Status: GOOD ( 12.87 ) 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); }