From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753423Ab1IFIA1 (ORCPT ); Tue, 6 Sep 2011 04:00:27 -0400 Received: from sm-d311v.smileserver.ne.jp ([203.211.202.206]:33657 "EHLO sm-d311v.smileserver.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753330Ab1IFIAT (ORCPT ); Tue, 6 Sep 2011 04:00:19 -0400 From: Tomoya MORINAGA To: Grant Likely , spi-devel-general@lists.sourceforge.net, linux-kernel@vger.kernel.org Cc: qi.wang@intel.com, yong.y.wang@intel.com, joel.clark@intel.com, kok.howg.ewe@intel.com, toshiharu-linux@dsn.okisemi.com, Tomoya MORINAGA Subject: [PATCH 1/5] spi-topcliff-pch: add tx-memory clear after complete transmitting Date: Tue, 6 Sep 2011 16:58:30 +0900 Message-Id: <1315295914-6862-1-git-send-email-tomoya-linux@dsn.okisemi.com> X-Mailer: git-send-email 1.7.4.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, in case of reading date from SPI flash, command is sent twice. The cause is that tx-memory clear processing is missing . This patch adds the tx-momory clear processing. Signed-off-by: Tomoya MORINAGA --- drivers/spi/spi-topcliff-pch.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 540c290..1b98b7e 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -839,6 +839,11 @@ static void pch_spi_start_transfer(struct pch_spi_data *data) dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent, DMA_FROM_DEVICE); + + dma_sync_sg_for_cpu(&data->master->dev, dma->sg_tx_p, dma->nent, + DMA_FROM_DEVICE); + memset(data->dma.tx_buf_virt, 0, PAGE_SIZE); + async_tx_ack(dma->desc_rx); async_tx_ack(dma->desc_tx); kfree(dma->sg_tx_p); -- 1.7.4.4