From patchwork Wed Jul 30 13:11:14 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vignesh Raman X-Patchwork-Id: 4649091 X-Patchwork-Delegate: vinod.koul@intel.com Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7EFD29F36A for ; Wed, 30 Jul 2014 13:12:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 76CBD20149 for ; Wed, 30 Jul 2014 13:12:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ADFE82012B for ; Wed, 30 Jul 2014 13:12:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753115AbaG3NLY (ORCPT ); Wed, 30 Jul 2014 09:11:24 -0400 Received: from relay1.mentorg.com ([192.94.38.131]:37826 "EHLO relay1.mentorg.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752555AbaG3NLW (ORCPT ); Wed, 30 Jul 2014 09:11:22 -0400 Received: from svr-orw-fem-01.mgc.mentorg.com ([147.34.98.93]) by relay1.mentorg.com with esmtp id 1XCTf7-0004jJ-JF from Vignesh_Raman@mentor.com ; Wed, 30 Jul 2014 06:11:21 -0700 Received: from SVR-ORW-FEM-02.mgc.mentorg.com ([147.34.96.206]) by svr-orw-fem-01.mgc.mentorg.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.4675); Wed, 30 Jul 2014 06:11:21 -0700 Received: from m4700.inp-wifi.mentorg.com (147.34.91.1) by svr-orw-fem-02.mgc.mentorg.com (147.34.96.168) with Microsoft SMTP Server id 14.2.247.3; Wed, 30 Jul 2014 06:10:40 -0700 From: Vignesh Raman To: , , , CC: Subject: [PATCH 1/2] dma: imx-sdma: use module_platform_driver for SDMA driver Date: Wed, 30 Jul 2014 18:41:14 +0530 Message-ID: <1406725875-9171-2-git-send-email-Vignesh_Raman@mentor.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1406725875-9171-1-git-send-email-Vignesh_Raman@mentor.com> References: <1406725875-9171-1-git-send-email-Vignesh_Raman@mentor.com> MIME-Version: 1.0 X-OriginalArrivalTime: 30 Jul 2014 13:11:21.0436 (UTC) FILETIME=[C1D669C0:01CFABF7] Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, 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 Currently there is no module_exit declared in SDMA driver, so that once sdma module is inserted, it's shown with permanent attribute by lsmod, and it can't be removed. Use module_platform_driver to register/unregister SDMA driver and modify SDMA's remove operation, to make SDMA driver possible to be removed. Signed-off-by: Jiada Wang --- drivers/dma/imx-sdma.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 14867e3..1360b9d 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1633,7 +1633,21 @@ err_irq: static int sdma_remove(struct platform_device *pdev) { - return -EBUSY; + struct sdma_engine *sdma = platform_get_drvdata(pdev); + struct resource *iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); + int irq = platform_get_irq(pdev, 0); + + dma_async_device_unregister(&sdma->dma_device); + kfree(sdma->script_addrs); + free_irq(irq, sdma); + iounmap(sdma->regs); + release_mem_region(iores->start, resource_size(iores)); + kfree(sdma); + + platform_set_drvdata(pdev, NULL); + + dev_info(&pdev->dev, "Removed...\n"); + return 0; } static struct platform_driver sdma_driver = {