From patchwork Thu Sep 19 23:16:39 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 2914581 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 37DB3BFF05 for ; Fri, 20 Sep 2013 01:35:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 50F1D203DB for ; Fri, 20 Sep 2013 01:35:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6D102202C3 for ; Fri, 20 Sep 2013 01:35:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753885Ab3ITBfG (ORCPT ); Thu, 19 Sep 2013 21:35:06 -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 S1753881Ab3ITBfE (ORCPT ); Thu, 19 Sep 2013 21:35:04 -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:Cc:To:From:References:In-Reply-To; bh=mptPFG6V+ZD/hqGi2dtotEuFOHWmA3O7G2Iw9nk2B1A=; b=VZzrYBBAm4XkGFKgcAmSlcIBu5P7Hh7VvFAcASbOL5akkrrfebkXAfUQf5t+SiTIgctBLDlLkYozKZe4U7WPCeTcV6+Eiol4d10PQXdm7QZKQCortCGpAkH/j9bUI1GzMrZtVVKM2XPaia9beUe28qsjQV6vchvqRA5q6FMv/p4=; Received: from e0022681537dd.dyn.arm.linux.org.uk ([2002:4e20:1eda:1:222:68ff:fe15:37dd]:59277 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 1VMnoe-0001IR-Gq; Fri, 20 Sep 2013 00:39:20 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.76) (envelope-from ) id 1VMnSh-0007sm-5t; Fri, 20 Sep 2013 00:16:39 +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 Cc: Doug Warzecha Subject: [PATCH 44/51] DMA-API: dcdbas: update DMA mask handing Message-Id: Date: Fri, 20 Sep 2013 00:16:39 +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 dcdbas was explicitly initializing DMA masks thusly: dcdbas_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); dcdbas_pdev->dev.dma_mask = &dcdbas_pdev->dev.coherent_dma_mask; which bypasses the architecture check. Moreover, it is creating the dcdbas_pdev device itself, and using the platform_device_register_full() avoids some of this explicit initialization. Convert the driver to use platform_device_register_full(), and as it makes use of coherent DMA, also call dma_set_coherent_mask() to ensure that the architecture gets to check the mask. Signed-off-by: Russell King --- drivers/firmware/dcdbas.c | 23 ++++++++++++----------- 1 files changed, 12 insertions(+), 11 deletions(-) diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c index ff080ee..a85fda2 100644 --- a/drivers/firmware/dcdbas.c +++ b/drivers/firmware/dcdbas.c @@ -549,8 +549,9 @@ static int dcdbas_probe(struct platform_device *dev) * BIOS SMI calls require buffer addresses be in 32-bit address space. * This is done by setting the DMA mask below. */ - dcdbas_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); - dcdbas_pdev->dev.dma_mask = &dcdbas_pdev->dev.coherent_dma_mask; + error = dma_set_coherent_mask(&dcdbas_pdev->dev, DMA_BIT_MASK(32)); + if (error) + return error; error = sysfs_create_group(&dev->dev.kobj, &dcdbas_attr_group); if (error) @@ -581,6 +582,12 @@ static struct platform_driver dcdbas_driver = { .remove = dcdbas_remove, }; +static const struct platform_device_info dcdbas_dev_info __initdata = { + .name = DRIVER_NAME, + .id = -1, + .dma_mask = DMA_BIT_MASK(32), +}; + /** * dcdbas_init: initialize driver */ @@ -592,20 +599,14 @@ static int __init dcdbas_init(void) if (error) return error; - dcdbas_pdev = platform_device_alloc(DRIVER_NAME, -1); - if (!dcdbas_pdev) { - error = -ENOMEM; + dcdbas_pdev = platform_device_register_full(&dcdbas_dev_info); + if (IS_ERR(dcdbas_pdev)) { + error = PTR_ERR(dcdbas_pdev); goto err_unregister_driver; } - error = platform_device_add(dcdbas_pdev); - if (error) - goto err_free_device; - return 0; - err_free_device: - platform_device_put(dcdbas_pdev); err_unregister_driver: platform_driver_unregister(&dcdbas_driver); return error;