From patchwork Tue May 26 13:26:01 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 6480471 Return-Path: X-Original-To: patchwork-linux-spi@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 06BE6C0434 for ; Tue, 26 May 2015 13:27:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2C523204AE for ; Tue, 26 May 2015 13:27:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4943B20625 for ; Tue, 26 May 2015 13:27:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754507AbbEZN1C (ORCPT ); Tue, 26 May 2015 09:27:02 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:37621 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754486AbbEZN0x (ORCPT ); Tue, 26 May 2015 09:26:53 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id t4QDQcTh008762; Tue, 26 May 2015 08:26:38 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id t4QDQbJf022751; Tue, 26 May 2015 08:26:37 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.224.2; Tue, 26 May 2015 08:26:37 -0500 Received: from dflp33.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id t4QDQ9bQ027427; Tue, 26 May 2015 08:26:34 -0500 From: Peter Ujfalusi To: , CC: , , , , , , , , , , , Ulf Hansson , Jarkko Nikula Subject: [PATCH 06/13] mmc: omap: Support for deferred probing when requesting DMA channels Date: Tue, 26 May 2015 16:26:01 +0300 Message-ID: <1432646768-12532-7-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.3.5 In-Reply-To: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> References: <1432646768-12532-1-git-send-email-peter.ujfalusi@ti.com> MIME-Version: 1.0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 Switch to use ma_request_slave_channel_compat_reason() to request the DMA channels. Only fall back to pio mode if the error code returned is not -EPROBE_DEFER, otherwise return from the probe with the -EPROBE_DEFER. Signed-off-by: Peter Ujfalusi CC: Ulf Hansson CC: Jarkko Nikula --- drivers/mmc/host/omap.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index 68dd6c79c378..29238d0fbc24 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -1390,20 +1390,32 @@ static int mmc_omap_probe(struct platform_device *pdev) res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); if (res) sig = res->start; - host->dma_tx = dma_request_slave_channel_compat(mask, + host->dma_tx = dma_request_slave_channel_compat_reason(mask, omap_dma_filter_fn, &sig, &pdev->dev, "tx"); - if (!host->dma_tx) + if (IS_ERR(host->dma_tx)) { + ret = PTR_ERR(host->dma_tx); + if (ret == -EPROBE_DEFER) + goto err_free_dma; + + host->dma_tx = NULL; dev_warn(host->dev, "unable to obtain TX DMA engine channel %u\n", sig); + } res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); if (res) sig = res->start; - host->dma_rx = dma_request_slave_channel_compat(mask, + host->dma_rx = dma_request_slave_channel_compat_reason(mask, omap_dma_filter_fn, &sig, &pdev->dev, "rx"); - if (!host->dma_rx) + if (IS_ERR(host->dma_rx)) { + ret = PTR_ERR(host->dma_rx); + if (ret == -EPROBE_DEFER) + goto err_free_dma; + + host->dma_rx = NULL; dev_warn(host->dev, "unable to obtain RX DMA engine channel %u\n", sig); + } ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host); if (ret)