From patchwork Fri Jan 24 09:31:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 233253 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=unavailable 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 8401EC2D0DB for ; Fri, 24 Jan 2020 09:46:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5A67821556 for ; Fri, 24 Jan 2020 09:46:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579859186; bh=PVQMQOdwGtcvWT7OyJMk9BAnoc/ujh46Vtd+oTDdsjQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MOd+AcY1ypxYbLijxeseJMMWgdQMW/6NuII0KbbKdO4yeLEU7BoBLS4ylopx/d5lh g+oXpCoJyQPe4EOsKD4g9qo+dIJebZMb1+xYEQL84vN8haGK0zdJWstSDc6rCY9IG8 kiCDXWrqVYeONOu28zIbAU/ODmSFKLomQVHdXPg0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732436AbgAXJmD (ORCPT ); Fri, 24 Jan 2020 04:42:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:39644 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730970AbgAXJmC (ORCPT ); Fri, 24 Jan 2020 04:42:02 -0500 Received: from localhost (unknown [145.15.244.15]) (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 DBBD920718; Fri, 24 Jan 2020 09:42:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579858921; bh=PVQMQOdwGtcvWT7OyJMk9BAnoc/ujh46Vtd+oTDdsjQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EBrxZ8hZyEWt782Mt2fjbEZ8SYyR0cwOA9EeJ55OzdnmiBDqffugi9UJiZKKTO/Ze 7lWmudqWIW/dfyQx+BbnkfJzLoDlqI14+W01Uf11+EwEs5N2Zz4k00FLRL/fNME+TD wC2YyH/pg+pN7BM5wsXSqKu+C2zeRBrmHCD1nvwo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alain Volmat , Pierre-Yves MORDRET , Wolfram Sang , Sasha Levin Subject: [PATCH 5.4 080/102] i2c: stm32f7: report dma error during probe Date: Fri, 24 Jan 2020 10:31:21 +0100 Message-Id: <20200124092818.734096685@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200124092806.004582306@linuxfoundation.org> References: <20200124092806.004582306@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: Alain Volmat [ Upstream commit d77eceb2de99f5d7e0c645bad15511fe1af59e09 ] Distinguish between the case where dma information is not provided within the DT and the case of an error during the dma init. Exit the probe with error in case of an error during dma init. Fixes: bb8822cbbc53 ("i2c: i2c-stm32: Add generic DMA API") Signed-off-by: Alain Volmat Reviewed-by: Pierre-Yves MORDRET Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-stm32.c | 16 ++++++++-------- drivers/i2c/busses/i2c-stm32f7.c | 9 +++++++++ 2 files changed, 17 insertions(+), 8 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32.c b/drivers/i2c/busses/i2c-stm32.c index 07d5dfce68d4c..1da347e6a3586 100644 --- a/drivers/i2c/busses/i2c-stm32.c +++ b/drivers/i2c/busses/i2c-stm32.c @@ -20,13 +20,13 @@ struct stm32_i2c_dma *stm32_i2c_dma_request(struct device *dev, dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); if (!dma) - return NULL; + return ERR_PTR(-ENOMEM); /* Request and configure I2C TX dma channel */ - dma->chan_tx = dma_request_slave_channel(dev, "tx"); - if (!dma->chan_tx) { + dma->chan_tx = dma_request_chan(dev, "tx"); + if (IS_ERR(dma->chan_tx)) { dev_dbg(dev, "can't request DMA tx channel\n"); - ret = -EINVAL; + ret = PTR_ERR(dma->chan_tx); goto fail_al; } @@ -42,10 +42,10 @@ struct stm32_i2c_dma *stm32_i2c_dma_request(struct device *dev, } /* Request and configure I2C RX dma channel */ - dma->chan_rx = dma_request_slave_channel(dev, "rx"); - if (!dma->chan_rx) { + dma->chan_rx = dma_request_chan(dev, "rx"); + if (IS_ERR(dma->chan_rx)) { dev_err(dev, "can't request DMA rx channel\n"); - ret = -EINVAL; + ret = PTR_ERR(dma->chan_rx); goto fail_tx; } @@ -75,7 +75,7 @@ fail_al: devm_kfree(dev, dma); dev_info(dev, "can't use DMA\n"); - return NULL; + return ERR_PTR(ret); } void stm32_i2c_dma_free(struct stm32_i2c_dma *dma) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index b88fc9d79287b..b2634afe066d3 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1955,6 +1955,15 @@ static int stm32f7_i2c_probe(struct platform_device *pdev) i2c_dev->dma = stm32_i2c_dma_request(i2c_dev->dev, phy_addr, STM32F7_I2C_TXDR, STM32F7_I2C_RXDR); + if (PTR_ERR(i2c_dev->dma) == -ENODEV) + i2c_dev->dma = NULL; + else if (IS_ERR(i2c_dev->dma)) { + ret = PTR_ERR(i2c_dev->dma); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, + "Failed to request dma error %i\n", ret); + goto clk_free; + } platform_set_drvdata(pdev, i2c_dev);