From patchwork Thu Sep 19 22:00:03 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 2914541 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6BF4DBFF05 for ; Fri, 20 Sep 2013 01:34:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8E005203C4 for ; Fri, 20 Sep 2013 01:34:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9DCA202C3 for ; Fri, 20 Sep 2013 01:34:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753504Ab3ITBes (ORCPT ); Thu, 19 Sep 2013 21:34:48 -0400 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:51855 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752048Ab3ITBes (ORCPT ); Thu, 19 Sep 2013 21:34:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=caramon; h=Date:Sender:Message-Id:Subject:To:From:References:In-Reply-To; bh=EMw3theAw0IcZZRkmDy+3S4QhVuy+IACFWA+aJ8y+ac=; b=MCVft0XUw9KLT4BHB0SA8XfIMnUzspTJS5X3JesrLYuM55yo/1nS6Tlm9oSJUofFTSZaepsok5A4eWWl5u9tXQL7YHgOTXjs/e/OTeam65whHvQ8W7I6/m2rm14i0gIAqK7zpIDMCTBTEyg9SRqZszQW2n+WFH6X3Th8cFZdFWg=; Received: from e0022681537dd.dyn.arm.linux.org.uk ([2002:4e20:1eda:1:222:68ff:fe15:37dd]:59166 helo=rmk-PC.arm.linux.org.uk) by caramon.arm.linux.org.uk with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.76) (envelope-from ) id 1VMnLF-0000qF-DJ; Fri, 20 Sep 2013 00:08:57 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.76) (envelope-from ) id 1VMmGZ-0007jU-99; Thu, 19 Sep 2013 23:00:03 +0100 In-Reply-To: <20130919212235.GD12758@n2100.arm.linux.org.uk> References: <20130919212235.GD12758@n2100.arm.linux.org.uk> From: Russell King To: alsa-devel@alsa-project.org, b43-dev@lists.infradead.org, devel@driverdev.osuosl.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, e1000-devel@lists.sourceforge.net, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-doc@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-ide@vger.kernel.org, linux-media@vger.kernel.org, linux-mmc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-omap@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-samsung-soc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Solarflare linux maintainers , uclinux-dist-devel@blackfin.uclinux.org Subject: [PATCH 35/51] DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent() Message-Id: Date: Thu, 19 Sep 2013 23:00:03 +0100 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Spam-Status: No, score=-3.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, KHOP_BIG_TO_CC,RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID, 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 The code sequence: dev->coherent_dma_mask = DMA_BIT_MASK(24); dev->dma_mask = &dev->coherent_dma_mask; bypasses the architectures check on the DMA mask. It can be replaced with dma_coerce_mask_and_coherent(), avoiding the direct initialization of this mask. Signed-off-by: Russell King --- drivers/parport/parport_pc.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c index 903e128..9637615 100644 --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -2004,6 +2004,7 @@ struct parport *parport_pc_probe_port(unsigned long int base, struct resource *ECR_res = NULL; struct resource *EPP_res = NULL; struct platform_device *pdev = NULL; + int ret; if (!dev) { /* We need a physical device to attach to, but none was @@ -2014,8 +2015,11 @@ struct parport *parport_pc_probe_port(unsigned long int base, return NULL; dev = &pdev->dev; - dev->coherent_dma_mask = DMA_BIT_MASK(24); - dev->dma_mask = &dev->coherent_dma_mask; + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24)); + if (ret) { + dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n"); + dma = PARPORT_DMA_NONE; + } } ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);