From patchwork Tue Sep 29 09:10:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomeu Vizoso X-Patchwork-Id: 7284451 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B9EB49F32B for ; Tue, 29 Sep 2015 09:27:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DFCF7206CC for ; Tue, 29 Sep 2015 09:27:57 +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 1414F206C5 for ; Tue, 29 Sep 2015 09:27:57 +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 1ZgrB2-0004vi-Ip; Tue, 29 Sep 2015 09:26:24 +0000 Received: from mail-wi0-x236.google.com ([2a00:1450:400c:c05::236]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zgqxs-0000NS-7y for linux-arm-kernel@lists.infradead.org; Tue, 29 Sep 2015 09:12:49 +0000 Received: by wicgb1 with SMTP id gb1so139409926wic.1 for ; Tue, 29 Sep 2015 02:12:30 -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=U2YgwXTvkR2iH5lIn9uK30lTOzX733/nSoxD/X3dllA=; b=KRAyuXrKZSMV/w0Tb8NZm1uCrb5Y2HBF47Ebp2SKaoEzdTDOd2ySRqwO4mK0tORnSo t/J6n8+0GH+WF87wjCKhlevZ+D7huH4UAuZNhDfQKnj5nbOi9wAuPRf640kM6Qsts5Al PnNL1+gD23ja8H2lA7xVGwEnYwACcj+TY0c1bO8fJ4MNpYiqApjQf1SwsQYT7s24QX+Z PjUT3SiIV6Zog6CUKh8GwIywrC2U7n98+v0uA5RRWw5CmhYlpUu3tbK0n1sQ3a4BjmMs NFOCCb3MmipzxJomEyo/wizpyqx9U6xAfkBdaZJkfY9dQzsLePOiduOOzOQaXxK2OELb blVw== X-Received: by 10.194.77.4 with SMTP id o4mr31029139wjw.4.1443517950274; Tue, 29 Sep 2015 02:12:30 -0700 (PDT) Received: from cizrna.lan ([109.72.12.204]) by smtp.gmail.com with ESMTPSA id lj12sm22757276wic.0.2015.09.29.02.12.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Sep 2015 02:12:29 -0700 (PDT) From: Tomeu Vizoso To: linux-kernel@vger.kernel.org Subject: [PATCH v7 17/20] dma: of: Probe DMA controllers on demand Date: Tue, 29 Sep 2015 11:10:55 +0200 Message-Id: <1443517859-30376-18-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1443517859-30376-1-git-send-email-tomeu.vizoso@collabora.com> References: <1443517859-30376-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150929_021248_564055_BE24D890 X-CRM114-Status: GOOD ( 13.08 ) X-Spam-Score: -2.4 (--) 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, Ulf Hansson , linux-acpi@vger.kernel.org, Arnd Bergmann , Stephen Warren , Greg Kroah-Hartman , Linus Walleij , Dmitry Torokhov , "Rafael J. Wysocki" , Rob Herring , Javier Martinez Canillas , Mark Brown , Thierry Reding , Russell King , Alan Stern , 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 --- 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);