From patchwork Tue May 26 18:53:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 225378 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93E61C433E0 for ; Tue, 26 May 2020 19:05:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6BED320776 for ; Tue, 26 May 2020 19:05:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590519949; bh=5xa30C6N17AVRqDi2Jmf/sGexGZQiLSNFqM0N6ArWXY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ULHLimqYTrXHPc4zusDiTHySwdWr6zSRTM3oI6twjE6CVlb0ewUE7lpSgjV7adXya tGwNkg8CJbRmidLrulCxSx4N1GAIDu4/PsZSSGaUg50kfZs9OygddtFK5ETCe6sWo8 /QTt4ih1ysDjlUEeN1G2w9Mu0dlgy19w+J6ELW3I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389654AbgEZTFr (ORCPT ); Tue, 26 May 2020 15:05:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:33752 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391530AbgEZTFo (ORCPT ); Tue, 26 May 2020 15:05:44 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 502EB208A7; Tue, 26 May 2020 19:05:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590519943; bh=5xa30C6N17AVRqDi2Jmf/sGexGZQiLSNFqM0N6ArWXY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1cJlRC56ADKig+fBHR3zYhXwyE7R1GY3Xoh80woI34XI7wmh4QyH4NjaGZjUmnmMJ GiE8v5fZel4n9PfP/UUfj/wrpF7EMW66TVjaciWyWA/Mpuj6+9+lkbFu7c0mNd//Yp pmKT90dIRDQZN0Oh+gRe4DXfokzVJ76jyQrvZneU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Fabrice Gasnier , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin Subject: [PATCH 4.19 78/81] iio: adc: stm32-dfsdm: fix device used to request dma Date: Tue, 26 May 2020 20:53:53 +0200 Message-Id: <20200526183935.711435313@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200526183923.108515292@linuxfoundation.org> References: <20200526183923.108515292@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Fabrice Gasnier [ Upstream commit b455d06e6fb3c035711e8aab1ca18082ccb15d87 ] DMA channel request should use device struct from platform device struct. Currently it's using iio device struct. But at this stage when probing, device struct isn't yet registered (e.g. device_register is done in iio_device_register). Since commit 71723a96b8b1 ("dmaengine: Create symlinks between DMA channels and slaves"), a warning message is printed as the links in sysfs can't be created, due to device isn't yet registered: - Cannot create DMA slave symlink - Cannot create DMA dma:rx symlink Fix this by using device struct from platform device to request dma chan. Fixes: eca949800d2d ("IIO: ADC: add stm32 DFSDM support for PDM microphone") Signed-off-by: Fabrice Gasnier Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/adc/stm32-dfsdm-adc.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index 516d7d22d9f4..1c492a7f4587 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -45,7 +45,7 @@ enum sd_converter_type { struct stm32_dfsdm_dev_data { int type; - int (*init)(struct iio_dev *indio_dev); + int (*init)(struct device *dev, struct iio_dev *indio_dev); unsigned int num_channels; const struct regmap_config *regmap_cfg; }; @@ -923,7 +923,8 @@ static void stm32_dfsdm_dma_release(struct iio_dev *indio_dev) } } -static int stm32_dfsdm_dma_request(struct iio_dev *indio_dev) +static int stm32_dfsdm_dma_request(struct device *dev, + struct iio_dev *indio_dev) { struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); struct dma_slave_config config = { @@ -933,7 +934,7 @@ static int stm32_dfsdm_dma_request(struct iio_dev *indio_dev) }; int ret; - adc->dma_chan = dma_request_chan(&indio_dev->dev, "rx"); + adc->dma_chan = dma_request_chan(dev, "rx"); if (IS_ERR(adc->dma_chan)) { int ret = PTR_ERR(adc->dma_chan); @@ -997,7 +998,7 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev, &adc->dfsdm->ch_list[ch->channel]); } -static int stm32_dfsdm_audio_init(struct iio_dev *indio_dev) +static int stm32_dfsdm_audio_init(struct device *dev, struct iio_dev *indio_dev) { struct iio_chan_spec *ch; struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); @@ -1027,10 +1028,10 @@ static int stm32_dfsdm_audio_init(struct iio_dev *indio_dev) indio_dev->num_channels = 1; indio_dev->channels = ch; - return stm32_dfsdm_dma_request(indio_dev); + return stm32_dfsdm_dma_request(dev, indio_dev); } -static int stm32_dfsdm_adc_init(struct iio_dev *indio_dev) +static int stm32_dfsdm_adc_init(struct device *dev, struct iio_dev *indio_dev) { struct iio_chan_spec *ch; struct stm32_dfsdm_adc *adc = iio_priv(indio_dev); @@ -1174,7 +1175,7 @@ static int stm32_dfsdm_adc_probe(struct platform_device *pdev) adc->dfsdm->fl_list[adc->fl_id].sync_mode = val; adc->dev_data = dev_data; - ret = dev_data->init(iio); + ret = dev_data->init(dev, iio); if (ret < 0) return ret;