From patchwork Tue Aug 27 11:46:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13779379 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 E0A3CC54735 for ; Tue, 27 Aug 2024 11:46:01 +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-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:To:From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=3yiIX9LDkrPDh7GRPqepNE1yKgPXfYii7nzLUNDEKOo=; b=ZIJU9ikIk3LiRilasH6WQE6+OY fLFAnm/0czEz03Fpr0L+DQBOw/r28IWpqn66y8lhebYwYJPpwp6BTsEHAZttm40EJ+EXh/qn2TpOA T9GLtClWLlkHwoiwrxtOMqOuhSbEunfTpfL8UuAEAYznXe3Qp1SQpefxcAn3g6JnoXOjvxxwxL+Ed R/Gk4zoBIvzwnDHMbCwJcwHwhJcGSES6IglIVmA9YsEfHs3VdrrV0XbPAMOYShcNEPtLudY8pxZ8G 7XbQh0QFJoPyhPioDzo1wSHYBXKi6hrNYlzKHeHcQpg95qT0mE6AHx1Frh8CPBTy3Ya5PQRVqEqVn tkc9K4tA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1siue1-0000000B5Im-191y; Tue, 27 Aug 2024 11:45:53 +0000 Received: from szxga08-in.huawei.com ([45.249.212.255]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1siuWl-0000000B2gh-2lzx for linux-arm-kernel@lists.infradead.org; Tue, 27 Aug 2024 11:38:28 +0000 Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4WtQWY6Vpgz14GKW; Tue, 27 Aug 2024 19:37:29 +0800 (CST) Received: from kwepemh500013.china.huawei.com (unknown [7.202.181.146]) by mail.maildlp.com (Postfix) with ESMTPS id C5510140202; Tue, 27 Aug 2024 19:38:16 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemh500013.china.huawei.com (7.202.181.146) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 27 Aug 2024 19:38:15 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH -next 7/8] soc: ti: knav_dma: Simplify with scoped for each OF child loop Date: Tue, 27 Aug 2024 19:46:06 +0800 Message-ID: <20240827114607.4019972-8-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240827114607.4019972-1-ruanjinjie@huawei.com> References: <20240827114607.4019972-1-ruanjinjie@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemh500013.china.huawei.com (7.202.181.146) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240827_043823_979254_5E55C539 X-CRM114-Status: GOOD ( 12.59 ) 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 Use scoped for_each_child_of_node_scoped() when iterating over device nodes to make code a bit simpler. And use the dev_err_probe() helper to simplify error handling during probe. This also handle scenario, when EDEFER is returned and useless error is printed. Signed-off-by: Jinjie Ruan --- drivers/soc/ti/knav_dma.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/drivers/soc/ti/knav_dma.c b/drivers/soc/ti/knav_dma.c index fb0746d8caad..eeec422a46f0 100644 --- a/drivers/soc/ti/knav_dma.c +++ b/drivers/soc/ti/knav_dma.c @@ -706,20 +706,15 @@ static int knav_dma_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *node = pdev->dev.of_node; - struct device_node *child; int ret = 0; - if (!node) { - dev_err(&pdev->dev, "could not find device info\n"); - return -EINVAL; - } + if (!node) + return dev_err_probe(&pdev->dev, -EINVAL, "could not find device info\n"); kdev = devm_kzalloc(dev, sizeof(struct knav_dma_pool_device), GFP_KERNEL); - if (!kdev) { - dev_err(dev, "could not allocate driver mem\n"); - return -ENOMEM; - } + if (!kdev) + return dev_err_probe(dev, -ENOMEM, "could not allocate driver mem\n"); kdev->dev = dev; INIT_LIST_HEAD(&kdev->list); @@ -732,10 +727,9 @@ static int knav_dma_probe(struct platform_device *pdev) } /* Initialise all packet dmas */ - for_each_child_of_node(node, child) { + for_each_child_of_node_scoped(node, child) { ret = dma_init(node, child); if (ret) { - of_node_put(child); dev_err(&pdev->dev, "init failed with %d\n", ret); break; }