From patchwork Thu Jul 5 09:23:27 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shubhrajyoti Datta X-Patchwork-Id: 1158761 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id A2D9BDFB7C for ; Thu, 5 Jul 2012 09:24:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753958Ab2GEJXy (ORCPT ); Thu, 5 Jul 2012 05:23:54 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:47700 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752210Ab2GEJXx (ORCPT ); Thu, 5 Jul 2012 05:23:53 -0400 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id q659NjXv010553; Thu, 5 Jul 2012 04:23:46 -0500 Received: from DBDE70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id q659NiUH028141; Thu, 5 Jul 2012 14:53:44 +0530 (IST) Received: from dbdp33.itg.ti.com (172.24.170.252) by dbde70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 14.1.323.3; Thu, 5 Jul 2012 14:53:44 +0530 Received: from ula0393217.india.ti.com (smtpvbd.itg.ti.com [172.24.170.250]) by dbdp33.itg.ti.com (8.13.8/8.13.8) with ESMTP id q659NgXq013679; Thu, 5 Jul 2012 14:53:43 +0530 From: Shubhrajyoti D To: CC: , , Shubhrajyoti D Subject: [PATCH RFC] spi: omap2-mcspi: Fix the dma_unmap warning Date: Thu, 5 Jul 2012 14:53:27 +0530 Message-ID: <1341480207-5651-1-git-send-email-shubhrajyoti@ti.com> X-Mailer: git-send-email 1.7.5.4 MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org The dma_map and dma_unmap should have same parameter passed otherwise we get the below warn. ks8851 spi1.0: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x000000009f22] [ 2.066925] Modules linked in: [ 2.070312] [ 2.071929] [] (unwind_backtrace+0x0/0x130) from [] (warn_slowpath_common+0x4c/0x64) [ 2.081909] [] (warn_slowpath_common+0x4c/0x64) from [] (warn_slowpath_fmt+0x30/0x40) [ 2.091949] [] (warn_slowpath_fmt+0x30/0x40) from [] (check_unmap+0x6d0/0x7b0) [ 2.101348] [] (check_unmap+0x6d0/0x7b0) from [] (debug_dma_unmap_page+0x64/0x70) [ 2.111053] [] (debug_dma_unmap_page+0x64/0x70) from [] (omap2_mcspi_txrx_dma+0x2d8/0x4fc) [ 2.121582] [] (omap2_mcspi_txrx_dma+0x2d8/0x4fc) from [] (omap2_mcspi_work.clone.4+0xf0/0x290) [ 2.132537] [] (omap2_mcspi_work.clone.4+0xf0/0x290) from [] (omap2_mcspi_transfer_one_message+0x288/0x438) [ 2.144592] [] (omap2_mcspi_transfer_one_message+0x288/0x438) from [] (spi_pump_messages+0x100/0x160) [ 2.156127] [] (spi_pump_messages+0x100/0x160) from [] (kthread_worker_fn+0xac/0x180) [ 2.166168] [] (kthread_worker_fn+0xac/0x180) from [] (kthread+0x90/0x9c) [ 2.175140] [] (kthread+0x90/0x9c) from [] (kernel_thread_exit+0x0/0x8) [ 2.183898] ---[ end trace d1830ce6e44292f2 ]--- Fix the warn by changing the unmap parameter to the one used while doing dma_map. Reported-by: Russell King Signed-off-by: Shubhrajyoti D Acked-by: Santosh Shilimkar --- drivers/spi/spi-omap2-mcspi.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 0c73dd4..37ccdb7 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -388,7 +388,8 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer) if (tx != NULL) { wait_for_completion(&mcspi_dma->dma_tx_completion); - dma_unmap_single(&spi->dev, xfer->tx_dma, count, DMA_TO_DEVICE); + dma_unmap_single(mcspi->dev, xfer->tx_dma, count, + DMA_TO_DEVICE); /* for TX_ONLY mode, be sure all words have shifted out */ if (rx == NULL) { @@ -403,7 +404,8 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer) if (rx != NULL) { wait_for_completion(&mcspi_dma->dma_rx_completion); - dma_unmap_single(&spi->dev, xfer->rx_dma, count, DMA_FROM_DEVICE); + dma_unmap_single(mcspi->dev, xfer->rx_dma, count, + DMA_FROM_DEVICE); omap2_mcspi_set_enable(spi, 0); if (l & OMAP2_MCSPI_CHCONF_TURBO) {