From patchwork Tue Oct 27 06:24:25 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaotian Jing X-Patchwork-Id: 7493991 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8990CBEEA4 for ; Tue, 27 Oct 2015 06:27:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BA566206E2 for ; Tue, 27 Oct 2015 06:27:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CFFCC206DC for ; Tue, 27 Oct 2015 06:27:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754066AbbJ0GZP (ORCPT ); Tue, 27 Oct 2015 02:25:15 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:33559 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754050AbbJ0GZL (ORCPT ); Tue, 27 Oct 2015 02:25:11 -0400 X-Listener-Flag: 11101 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 6128580; Tue, 27 Oct 2015 14:25:06 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.181.6; Tue, 27 Oct 2015 14:25:04 +0800 From: Chaotian Jing To: Ulf Hansson CC: , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Matthias Brugger , Catalin Marinas , Will Deacon , Seungwon Jeon , Jaehoon Chung , Kukjin Kim , Krzysztof Kozlowski , Barry Song , Hans de Goede , Chaotian Jing , Lars-Peter Clausen , Javier Martinez Canillas , Sascha Hauer , Howard Chen , Adrian Hunter , Kristina Martsenko , Sergei Shtylyov , Stephen Boyd , Minda Chen , Dong Aisheng , Johan Derycke , Haibo Chen , Fabio Estevam , Georgi Djakov , , Weijun Yang , Kevin Hao , , , , , , Subject: [PATCH v3 05/10] mmc: mediatek: fix got GPD checksum error interrupt when data transfer Date: Tue, 27 Oct 2015 14:24:25 +0800 Message-ID: <1445927070-5102-6-git-send-email-chaotian.jing@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1445927070-5102-1-git-send-email-chaotian.jing@mediatek.com> References: <1445927070-5102-1-git-send-email-chaotian.jing@mediatek.com> MIME-Version: 1.0 X-MTK: N Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 Even if we only use one gpd, we need alloc 2 gpd and make the gpd->next pointer to the second gpd, or may get gpd checksum error, this was checked by hardware Signed-off-by: Chaotian Jing --- drivers/mmc/host/mtk-sd.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index c877ded..3858163 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -1145,11 +1145,14 @@ static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma) struct mt_bdma_desc *bd = dma->bd; int i; - memset(gpd, 0, sizeof(struct mt_gpdma_desc)); + memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2); gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */ gpd->ptr = (u32)dma->bd_addr; /* physical address */ - + /* gpd->next is must set for desc DMA + * That's why must alloc 2 gpd structure. + */ + gpd->next = (u32)dma->gpd_addr + sizeof(struct mt_gpdma_desc); memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM); for (i = 0; i < (MAX_BD_NUM - 1); i++) bd[i].next = (u32)dma->bd_addr + sizeof(*bd) * (i + 1); @@ -1306,7 +1309,7 @@ static int msdc_drv_probe(struct platform_device *pdev) host->timeout_clks = 3 * 1048576; host->dma.gpd = dma_alloc_coherent(&pdev->dev, - sizeof(struct mt_gpdma_desc), + 2 * sizeof(struct mt_gpdma_desc), &host->dma.gpd_addr, GFP_KERNEL); host->dma.bd = dma_alloc_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc), @@ -1347,7 +1350,7 @@ release: release_mem: if (host->dma.gpd) dma_free_coherent(&pdev->dev, - sizeof(struct mt_gpdma_desc), + 2 * sizeof(struct mt_gpdma_desc), host->dma.gpd, host->dma.gpd_addr); if (host->dma.bd) dma_free_coherent(&pdev->dev,