From patchwork Mon May 25 14:53:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomeu Vizoso X-Patchwork-Id: 6475661 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 188D1C0020 for ; Mon, 25 May 2015 15:19:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 592E720303 for ; Mon, 25 May 2015 15:19:05 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0F77A203AB for ; Mon, 25 May 2015 15:19:04 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Ywu5x-0002Is-0i; Mon, 25 May 2015 15:15:13 +0000 Received: from mail-wi0-x22f.google.com ([2a00:1450:400c:c05::22f]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YwtqI-0004fp-PU for linux-arm-kernel@lists.infradead.org; Mon, 25 May 2015 14:59:06 +0000 Received: by wizk4 with SMTP id k4so50656075wiz.1 for ; Mon, 25 May 2015 07:58:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=+eYejkDKzFtngG3RenvshNsFLOOjGerIx74GOK6dIgc=; b=hpIypW0u2zpognzWPwF9DwgVRipFAGU2XgSyjgealPiKvZojlj5aJ6xL75rvm3plAX 5Nc8x1tErylu8xR3cb0UlUrvmNd+YndWiMh8hOFMNxPC34/KYJBBX7QUUNSMqvbJdv8m 216f8J68Aox0YuedmRbsNQJZxThrq4mznEp3FXzuXCLL4ucxWyoMHJ37pdrf6craDK0N MrUy2FfMivYtnlwtQZberDYB20WEl/kFSU02p8T+pvGuFUJwhYr4+GU/KjE5gduvwV63 GAcaSsYS/iOr6QRbWqbNRzgVUhfUc9PCSzO2/HxOXBFyP6p9ppcdBROEVa0lTX1G49MO tF8Q== X-Received: by 10.180.76.228 with SMTP id n4mr11976847wiw.44.1432565921368; Mon, 25 May 2015 07:58:41 -0700 (PDT) Received: from cizrna.lan ([109.72.12.80]) by mx.google.com with ESMTPSA id ez19sm12258917wid.19.2015.05.25.07.58.39 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 25 May 2015 07:58:40 -0700 (PDT) From: Tomeu Vizoso To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 20/21] dma: of: Probe DMA controllers on demand Date: Mon, 25 May 2015 16:53:24 +0200 Message-Id: <1432565608-26036-21-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.1 In-Reply-To: <1432565608-26036-1-git-send-email-tomeu.vizoso@collabora.com> References: <1432565608-26036-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150525_075903_013369_4427E0A1 X-CRM114-Status: UNSURE ( 8.87 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: Mark Rutland , dmaengine@vger.kernel.org, Tomeu Vizoso , Vinod Koul , Dmitry Torokhov , linux-kernel@vger.kernel.org, Rob Herring , =?UTF-8?q?St=C3=A9phane=20Marchesin?= , Thierry Reding , Grant Likely , Alexander Holler , Dan Williams X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When looking up a DMA controller through its DT node, ensure that the corresponding device has been registered. Signed-off-by: Tomeu Vizoso --- drivers/dma/of-dma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index cbd4a8a..2bdb3da 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -17,6 +17,7 @@ #include #include #include +#include static LIST_HEAD(of_dma_list); static DEFINE_MUTEX(of_dma_lock); @@ -174,6 +175,8 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np, if (of_dma_match_channel(np, name, i, &dma_spec)) continue; + of_platform_device_ensure(dma_spec.np); + mutex_lock(&of_dma_lock); ofdma = of_dma_find_controller(&dma_spec);