Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965115AbWIKXSw (ORCPT ); Mon, 11 Sep 2006 19:18:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965112AbWIKXSv (ORCPT ); Mon, 11 Sep 2006 19:18:51 -0400 Received: from mga03.intel.com ([143.182.124.21]:40122 "EHLO mga03.intel.com") by vger.kernel.org with ESMTP id S965102AbWIKXSj (ORCPT ); Mon, 11 Sep 2006 19:18:39 -0400 X-ExtLoop1: 1 X-IronPort-AV: i="4.09,147,1157353200"; d="scan'208"; a="114947122:sNHT44377942" From: Dan Williams Subject: [PATCH 12/19] dmaengine: dma_async_memcpy_err for DMA engines that do not support memcpy Date: Mon, 11 Sep 2006 16:18:39 -0700 To: neilb@suse.de, linux-raid@vger.kernel.org Cc: akpm@osdl.org, linux-kernel@vger.kernel.org, christopher.leech@intel.com Message-Id: <20060911231838.4737.6812.stgit@dwillia2-linux.ch.intel.com> In-Reply-To: <1158015632.4241.31.camel@dwillia2-linux.ch.intel.com> References: <1158015632.4241.31.camel@dwillia2-linux.ch.intel.com> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit User-Agent: StGIT/0.10 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1643 Lines: 48 From: Dan Williams Default virtual function that returns an error if the user attempts a memcpy operation. An XOR engine is an example of a DMA engine that does not support memcpy. Signed-off-by: Dan Williams --- drivers/dma/dmaengine.c | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index fe62237..33ad690 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -593,6 +593,18 @@ void dma_async_device_unregister(struct } /** + * dma_async_do_memcpy_err - default function for dma devices that + * do not support memcpy + */ +dma_cookie_t dma_async_do_memcpy_err(struct dma_chan *chan, + union dmaengine_addr dest, unsigned int dest_off, + union dmaengine_addr src, unsigned int src_off, + size_t len, unsigned long flags) +{ + return -ENXIO; +} + +/** * dma_async_do_xor_err - default function for dma devices that * do not support xor */ @@ -642,6 +654,7 @@ EXPORT_SYMBOL_GPL(dma_async_issue_pendin EXPORT_SYMBOL_GPL(dma_async_device_register); EXPORT_SYMBOL_GPL(dma_async_device_unregister); EXPORT_SYMBOL_GPL(dma_chan_cleanup); +EXPORT_SYMBOL_GPL(dma_async_do_memcpy_err); EXPORT_SYMBOL_GPL(dma_async_do_xor_err); EXPORT_SYMBOL_GPL(dma_async_do_memset_err); EXPORT_SYMBOL_GPL(dma_async_chan_init); - 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/