From patchwork Fri Sep 27 00:24:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rob Herring (Arm)" X-Patchwork-Id: 1168180 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46fXdK176pz9sPW for ; Fri, 27 Sep 2019 10:25:41 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727828AbfI0AZI (ORCPT ); Thu, 26 Sep 2019 20:25:08 -0400 Received: from mail-oi1-f196.google.com ([209.85.167.196]:38700 "EHLO mail-oi1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727777AbfI0AZH (ORCPT ); Thu, 26 Sep 2019 20:25:07 -0400 Received: by mail-oi1-f196.google.com with SMTP id m16so3747036oic.5; Thu, 26 Sep 2019 17:25:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=+Kwduh2L3Q3wglxQRQFNc0vVRF7aZPumhA9/VlLU+NE=; b=mjhcUDE8XUiETIYkOZkncJVwXFfDn3+5OtMOKkMygQtL0EMH6+dzILudd6EoFv4LRt NFOVho6exq84wuyEEwcJayqJJ6hzsSz6HAQK1rgWBpW1V52UgdUZe3AHwUtVGOGK73Y+ aw0vdIsvkAPuEyEvBkTE3pZmOdTDD7jIw35WNmM9Bx/iLhYrfQCtF7sZ0k7O4VdRjGbC LV4eBoFPJeKw4wt+FWwOuntgjxUqw9mhdypHpHS2W5oyE5EoT2EUSW7YqLecLlAfMsWl lD+3oBlaBBxy4s1L0rVECGMI0c5BFFOXhHwwxeKXX0kWFzxrj9kvJ9bT72PyFp6Uf5fX UN/A== X-Gm-Message-State: APjAAAW8KwnBEzAcWpKg7+K+BIwbrJgcq/hMxW7G8FI6SvMK3qn+OlK/ 0U7Iss5M88wxi5UOZ4txzZdhKvY= X-Google-Smtp-Source: APXvYqwZ4lR/YWP5vXy1ugIkWQ7hYP0e0FO8/TUE1SqXSQM+108Okq4ee9Kd9IvMs2n7+cX5zbFRVg== X-Received: by 2002:aca:540a:: with SMTP id i10mr4633085oib.108.1569543906002; Thu, 26 Sep 2019 17:25:06 -0700 (PDT) Received: from xps15.herring.priv (24-155-109-49.dyn.grandenetworks.net. [24.155.109.49]) by smtp.googlemail.com with ESMTPSA id j11sm339866otk.80.2019.09.26.17.25.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Sep 2019 17:25:05 -0700 (PDT) From: Rob Herring To: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Nicolas Saenz Julienne , Robin Murphy , Florian Fainelli , Stefan Wahren , Frank Rowand , Arnd Bergmann , Marek Vasut , Geert Uytterhoeven , Simon Horman , Lorenzo Pieralisi , Oza Pawandeep Subject: [PATCH 06/11] of/address: Introduce of_get_next_dma_parent() helper Date: Thu, 26 Sep 2019 19:24:50 -0500 Message-Id: <20190927002455.13169-7-robh@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190927002455.13169-1-robh@kernel.org> References: <20190927002455.13169-1-robh@kernel.org> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Robin Murphy Add of_get_next_dma_parent() helper which is similar to __of_get_dma_parent(), but can be used in iterators and decrements the ref count on the prior parent. Signed-off-by: Robin Murphy Signed-off-by: Rob Herring Reviewed-by: Geert Uytterhoeven --- drivers/of/address.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/of/address.c b/drivers/of/address.c index 53d2656c2269..e9188c82fdae 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -695,6 +695,16 @@ static struct device_node *__of_get_dma_parent(const struct device_node *np) return of_node_get(args.np); } +static struct device_node *of_get_next_dma_parent(struct device_node *np) +{ + struct device_node *parent; + + parent = __of_get_dma_parent(np); + of_node_put(np); + + return parent; +} + u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr) { struct device_node *host;