From patchwork Mon Jul 22 17:59:49 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 2831517 Return-Path: X-Original-To: patchwork-linux-mmc@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 297C79F243 for ; Mon, 22 Jul 2013 18:01:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 24C5320265 for ; Mon, 22 Jul 2013 18:01:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0977E20283 for ; Mon, 22 Jul 2013 18:01:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932386Ab3GVSBI (ORCPT ); Mon, 22 Jul 2013 14:01:08 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:53472 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932114Ab3GVSBH (ORCPT ); Mon, 22 Jul 2013 14:01:07 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id r6MHxt5V011492; Mon, 22 Jul 2013 12:59:55 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id r6MHxtLx026111; Mon, 22 Jul 2013 12:59:55 -0500 Received: from dlelxv22.itg.ti.com (172.17.1.197) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.2.342.3; Mon, 22 Jul 2013 12:59:54 -0500 Received: from joel-laptop.itg.ti.com (h114-167.vpn.ti.com [172.24.114.167]) by dlelxv22.itg.ti.com (8.13.8/8.13.8) with ESMTP id r6MHxnFH004389; Mon, 22 Jul 2013 12:59:54 -0500 From: Joel Fernandes To: Tony Lindgren , Sekhar Nori , Vinod Koul , Benoit Cousson , Balaji TK , Arnd Bergmann CC: Jason Kridner , Mark Jackson , Linux OMAP List , Linux ARM Kernel List , Linux Kernel Mailing List , Linux MMC List , Pantel Antoniou , Joel Fernandes Subject: [PATCH v2] ARM: EDMA: Fix clearing of unused list for DT DMA resources Date: Mon, 22 Jul 2013 12:59:49 -0500 Message-ID: <1374515989-7391-1-git-send-email-joelf@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-8.3 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 HWMOD removal for MMC is breaking edma_start as the events are being manually triggered due to unused channel list not being clear, Thanks to Balaji TK for finding this issue. This patch fixes the issue, by reading the "dmas" property from the DT node if it exists and clearing the bits in the unused channel list. Cc: Balaji T K Cc: Pantel Antoniou Signed-off-by: Joel Fernandes --- v2 changes: Fixed compiler warning arch/arm/common/edma.c | 31 +++++++++++++++++++++++-------- 1 file changed, 23 insertions(+), 8 deletions(-) diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c index a432e6c..765d578 100644 --- a/arch/arm/common/edma.c +++ b/arch/arm/common/edma.c @@ -561,14 +561,29 @@ static int reserve_contiguous_slots(int ctlr, unsigned int id, static int prepare_unused_channel_list(struct device *dev, void *data) { struct platform_device *pdev = to_platform_device(dev); - int i, ctlr; - - for (i = 0; i < pdev->num_resources; i++) { - if ((pdev->resource[i].flags & IORESOURCE_DMA) && - (int)pdev->resource[i].start >= 0) { - ctlr = EDMA_CTLR(pdev->resource[i].start); - clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start), - edma_cc[ctlr]->edma_unused); + int i = 0, ctlr; + u32 dma_chan; + const __be32 *dma_chan_p; + struct property *prop; + + if (dev->of_node) { + of_property_for_each_u32(dev->of_node, "dmas", prop, \ + dma_chan_p, dma_chan) { + if (i++ & 1) { + ctlr = EDMA_CTLR(dma_chan); + clear_bit(EDMA_CHAN_SLOT(dma_chan), + edma_cc[ctlr]->edma_unused); + } + } + } else { + for (; i < pdev->num_resources; i++) { + if ((pdev->resource[i].flags & IORESOURCE_DMA) && + (int)pdev->resource[i].start >= 0) { + ctlr = EDMA_CTLR(pdev->resource[i].start); + clear_bit(EDMA_CHAN_SLOT( + pdev->resource[i].start), + edma_cc[ctlr]->edma_unused); + } } }