From patchwork Mon Sep 7 12:23:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomeu Vizoso X-Patchwork-Id: 7134451 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 4313DBEEC1 for ; Mon, 7 Sep 2015 12:27:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 660282066B for ; Mon, 7 Sep 2015 12:27:51 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 99D0E20673 for ; Mon, 7 Sep 2015 12:27:50 +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 1ZYvUo-0001pl-Lf; Mon, 07 Sep 2015 12:26:02 +0000 Received: from mail-wi0-x230.google.com ([2a00:1450:400c:c05::230]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZYvTo-0007zM-S5 for linux-arm-kernel@lists.infradead.org; Mon, 07 Sep 2015 12:25:01 +0000 Received: by wicgb1 with SMTP id gb1so43985622wic.1 for ; Mon, 07 Sep 2015 05:24:39 -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=JiprZfI7C4JEFBPBz2rL1qt9Lst13CJMZr6xXpCm3/A=; b=KgDs+KdEjZT9+a1zklae3ACkOcYv6kPAn0MEdL5ZTR0Sf8WC4nN8NYt+40aYcY0ZfC khXU+B6oYh0av/p482b5h6xzWjSEAtBGplVkbSVzARR6+Wy2WbwxkdLBbAIFsCWetzNI B5/J5y7QTy2BPm4sWy716WqVAg5UtGpmkmTesqKuernbdHmApWxIMJVL1okv8pDdJEj+ 6j/IDIRfvXUmNpWau05gGO7Wv6yusmTKXmii4CQc0w2twhkcHmGwE2QPl2jGN+VtEs/c Cb/UUbDQdjT1joD8bNiAmyyBnsXOZ0g/gNtHiDHjv+FLWy1HNyS3qvEH4iO/P21Q+M3O mw4w== X-Received: by 10.194.95.71 with SMTP id di7mr35846135wjb.125.1441628679376; Mon, 07 Sep 2015 05:24:39 -0700 (PDT) Received: from cizrna.lan ([109.72.12.78]) by smtp.gmail.com with ESMTPSA id cm6sm15438wib.22.2015.09.07.05.24.37 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 Sep 2015 05:24:38 -0700 (PDT) From: Tomeu Vizoso To: linux-kernel@vger.kernel.org Subject: [PATCH v4 18/22] dma: of: Probe DMA controllers on demand Date: Mon, 7 Sep 2015 14:23:43 +0200 Message-Id: <1441628627-5143-19-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1441628627-5143-1-git-send-email-tomeu.vizoso@collabora.com> References: <1441628627-5143-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150907_052501_099303_69FD0067 X-CRM114-Status: GOOD ( 13.25 ) X-Spam-Score: -2.3 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tomeu Vizoso , devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, Arnd Bergmann , Stephen Warren , Vinod Koul , Linus Walleij , Dmitry Torokhov , "Rafael J. Wysocki" , Rob Herring , Javier Martinez Canillas , Mark Brown , Thierry Reding , dmaengine@vger.kernel.org, Dan Williams , linux-arm-kernel@lists.infradead.org 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 OF node, probe it if it hasn't already. The goal is to reduce deferred probes to a minimum, as it makes it very cumbersome to find out why a device failed to probe, and can introduce very big delays in when a critical device is probed. Signed-off-by: Tomeu Vizoso --- Changes in v4: None Changes in v3: None Changes in v2: None 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 1e1f2986eba8..e899832f7df3 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -16,6 +16,7 @@ #include #include #include +#include #include static LIST_HEAD(of_dma_list); @@ -263,6 +264,8 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np, if (of_dma_match_channel(np, name, i, &dma_spec)) continue; + of_device_probe(dma_spec.np); + mutex_lock(&of_dma_lock); ofdma = of_dma_find_controller(&dma_spec);