From patchwork Thu Aug 6 14:11:53 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomeu Vizoso X-Patchwork-Id: 6960041 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 DF39EC05AC for ; Thu, 6 Aug 2015 14:26:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 24CA120680 for ; Thu, 6 Aug 2015 14:26:10 +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 5492A20274 for ; Thu, 6 Aug 2015 14:26:09 +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 1ZNM5W-0008FK-Te; Thu, 06 Aug 2015 14:24:07 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZNM1D-000372-7p for linux-arm-kernel@bombadil.infradead.org; Thu, 06 Aug 2015 14:19:39 +0000 Received: from mail-wi0-x229.google.com ([2a00:1450:400c:c05::229]) by merlin.infradead.org with esmtps (Exim 4.85 #2 (Red Hat Linux)) id 1ZNM1A-0003tA-UI for linux-arm-kernel@lists.infradead.org; Thu, 06 Aug 2015 14:19:38 +0000 Received: by wijp15 with SMTP id p15so24640806wij.0 for ; Thu, 06 Aug 2015 07:19:13 -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=a+LhRYPJCtSr1SBRHu1zAYUOxBgMT5hGNrnD1KD3VS8=; b=h493C3PZahFIgXij8214XgqNTXa82dHdF+EDOLOLlWC+lf3P46e6k+wiutwEHQwhgh QR1fDyHA0r0e5hEzTP9/87Ko3bI5TzuQ/joWEQAVWeA7Evu4/t+tIZRJhEOeWQKQZLkz ifHT4ImpfWg/jEI0o+xzQcpKKhAQ6hbKSt+/ijWZUCTOhUFqWJv/GjjCYS3+Wx1ww4dH z6DI+TrzZdnRD3ALjw0uiEyT6xLSy9wSSxpEE6lnZC57LAD0O9UMovM8d+XIFXkk30Vy hiJasnPrQ3cDmRLEWfkWY4mW6HQSb1nO6L4CpOua2jTDlyF0OFrniXSTaUNP1OA7/h3h glYw== X-Received: by 10.180.188.3 with SMTP id fw3mr6930221wic.5.1438870753233; Thu, 06 Aug 2015 07:19:13 -0700 (PDT) Received: from cizrna.lan ([109.72.12.154]) by smtp.gmail.com with ESMTPSA id z5sm9727282wjr.42.2015.08.06.07.19.11 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 06 Aug 2015 07:19:12 -0700 (PDT) From: Tomeu Vizoso To: linux-kernel@vger.kernel.org Subject: [PATCH v3 16/18] dma: of: Probe DMA controllers on demand Date: Thu, 6 Aug 2015 16:11:53 +0200 Message-Id: <1438870315-18689-17-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1438870315-18689-1-git-send-email-tomeu.vizoso@collabora.com> References: <1438870315-18689-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150806_101937_254972_3DDBD624 X-CRM114-Status: GOOD ( 11.85 ) 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, linux-acpi@vger.kernel.org, Arnd Bergmann , Stephen Warren , Linus Walleij , Dmitry Torokhov , "Rafael J. Wysocki" , Rob Herring , Javier Martinez Canillas , Mark Brown , Thierry Reding , 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=-4.2 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable 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 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..9cfc818b9dc8 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); @@ -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_platform_probe(dma_spec.np); + mutex_lock(&of_dma_lock); ofdma = of_dma_find_controller(&dma_spec);