Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757835Ab3HAWJm (ORCPT ); Thu, 1 Aug 2013 18:09:42 -0400 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:39810 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754579Ab3HAWJl (ORCPT ); Thu, 1 Aug 2013 18:09:41 -0400 In-Reply-To: <20130801213420.GL23006@n2100.arm.linux.org.uk> References: <20130801213420.GL23006@n2100.arm.linux.org.uk> From: Russell King To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Arnd Bergmann Subject: [PATCH RFC 35/51] DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent() Message-Id: Date: Thu, 01 Aug 2013 23:09:11 +0100 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1595 Lines: 46 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); -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/