From patchwork Mon Mar 14 22:54:38 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 8584311 Return-Path: X-Original-To: patchwork-linux-arm@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 5B707C0553 for ; Mon, 14 Mar 2016 22:59:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5DD9C202A1 for ; Mon, 14 Mar 2016 22:59:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5B1CA2027D for ; Mon, 14 Mar 2016 22:59:22 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1afbQp-0005jM-Ey; Mon, 14 Mar 2016 22:57:47 +0000 Received: from vern.gendns.com ([206.190.152.46]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1afbPq-0005CZ-KS for linux-arm-kernel@lists.infradead.org; Mon, 14 Mar 2016 22:56:49 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lechnology.com; s=default; h=References:In-Reply-To:Message-Id:Date:Subject :Cc:To:From; bh=htjD9OusXIeQzYFJexc12+jXXxfsIRoT9Wz0xIcQJLE=; b=DpGfN0G/EZK25 n+iKFovyLEkaLmKsg3IvRI2AEuX98xzLz4F1hR6KJjjYAD9svmnT7EaQKBFoKtikCpzpI8o9eKJ8m tiTVxrWNlRFIQPkhJT0ocgNBVdSP0yKsjkRLZ4fML1J2huxuijS8mZ2Ihvy1MS6Rt2uwe7V/yOAHA 5Yau77Fm78Vq09FTIE11Eoafai8ogw/rT3UF7mO1RXz+0aa6aHrFTcKAftbXdPe/VjKqYkNzzn8wE F5Pkbyu3X1F+oP2naKnvFF3LvxEJXcMV8S3cud8epAxJ5OoW7tBbnA3ujQO4sh6u1LqHGL3TAbC3m VsfO9jpyfnYntnCvmDZ6g==; Received: from 108-198-5-147.lightspeed.okcbok.sbcglobal.net ([108.198.5.147]:51177 helo=freyr.lechnology.com) by vern.gendns.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-SHA256:128) (Exim 4.86_1) (envelope-from ) id 1afbPT-000pzK-Bp; Mon, 14 Mar 2016 18:56:23 -0400 From: David Lechner To: nsekhar@ti.com Subject: [PATCH v2 2/5] mmc: davinci: fix unwinding in probe Date: Mon, 14 Mar 2016 17:54:38 -0500 Message-Id: <1457996081-21975-3-git-send-email-david@lechnology.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1457996081-21975-1-git-send-email-david@lechnology.com> References: <56E6BF7E.7020401@ti.com> <1457996081-21975-1-git-send-email-david@lechnology.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160314_155646_843348_8F051EB1 X-CRM114-Status: UNSURE ( 9.78 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.0 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ulf.hansson@linaro.org, David Lechner , khilman@kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,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 Unwiding from an error in davinci_mmcsd_probe was a mess. Some errors were not handled and not all paths unwound correctly. Also using devm_ where possible to simplify things. Signed-off-by: David Lechner --- v2 changes: use devm_ where possible drivers/mmc/host/davinci_mmc.c | 93 ++++++++++++++++-------------------------- 1 file changed, 35 insertions(+), 58 deletions(-) diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index a294d261..6dd9562 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -1223,7 +1223,7 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) struct mmc_davinci_host *host = NULL; struct mmc_host *mmc = NULL; struct resource *r, *mem = NULL; - int ret = 0, irq = 0; + int ret, irq; size_t mem_size; const struct platform_device_id *id_entry; @@ -1233,22 +1233,20 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) return -ENOENT; } - ret = -ENODEV; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); if (!r || irq == NO_IRQ) - goto out; + return -ENODEV; - ret = -EBUSY; mem_size = resource_size(r); - mem = request_mem_region(r->start, mem_size, pdev->name); + mem = devm_request_mem_region(&pdev->dev, r->start, mem_size, + pdev->name); if (!mem) - goto out; + return -EBUSY; - ret = -ENOMEM; mmc = mmc_alloc_host(sizeof(struct mmc_davinci_host), &pdev->dev); if (!mmc) - goto out; + ret = -ENOMEM; host = mmc_priv(mmc); host->mmc = mmc; /* Important */ @@ -1266,17 +1264,19 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) host->txdma = r->start; host->mem_res = mem; - host->base = ioremap(mem->start, mem_size); + host->base = devm_ioremap(&pdev->dev, mem->start, mem_size); if (!host->base) - goto out; + goto ioremap_fail; - ret = -ENXIO; - host->clk = clk_get(&pdev->dev, NULL); + host->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(host->clk)) { ret = PTR_ERR(host->clk); - goto out; + goto clk_get_fail; } - clk_enable(host->clk); + ret = clk_enable(host->clk); + if (ret) + goto clk_enable_fail; + host->mmc_input_clk = clk_get_rate(host->clk); init_mmcsd_host(host); @@ -1346,15 +1346,17 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) ret = mmc_add_host(mmc); if (ret < 0) - goto out; + goto mmc_add_host_fail; - ret = request_irq(irq, mmc_davinci_irq, 0, mmc_hostname(mmc), host); + ret = devm_request_irq(&pdev->dev, irq, mmc_davinci_irq, 0, + mmc_hostname(mmc), host); if (ret) - goto out; + goto request_irq_fail; if (host->sdio_irq >= 0) { - ret = request_irq(host->sdio_irq, mmc_davinci_sdio_irq, 0, - mmc_hostname(mmc), host); + ret = devm_request_irq(&pdev->dev, host->sdio_irq, + mmc_davinci_sdio_irq, 0, + mmc_hostname(mmc), host); if (!ret) mmc->caps |= MMC_CAP_SDIO_IRQ; } @@ -1367,28 +1369,17 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) return 0; -out: +request_irq_fail: + mmc_remove_host(mmc); +mmc_add_host_fail: mmc_davinci_cpufreq_deregister(host); cpu_freq_fail: - if (host) { - davinci_release_dma_channels(host); - - if (host->clk) { - clk_disable(host->clk); - clk_put(host->clk); - } - - if (host->base) - iounmap(host->base); - } - - if (mmc) - mmc_free_host(mmc); - - if (mem) - release_resource(mem); - - dev_dbg(&pdev->dev, "probe err %d\n", ret); + davinci_release_dma_channels(host); + clk_disable(host->clk); +clk_enable_fail: +clk_get_fail: +ioremap_fail: + mmc_free_host(mmc); return ret; } @@ -1397,25 +1388,11 @@ static int __exit davinci_mmcsd_remove(struct platform_device *pdev) { struct mmc_davinci_host *host = platform_get_drvdata(pdev); - if (host) { - mmc_davinci_cpufreq_deregister(host); - - mmc_remove_host(host->mmc); - free_irq(host->mmc_irq, host); - if (host->mmc->caps & MMC_CAP_SDIO_IRQ) - free_irq(host->sdio_irq, host); - - davinci_release_dma_channels(host); - - clk_disable(host->clk); - clk_put(host->clk); - - iounmap(host->base); - - release_resource(host->mem_res); - - mmc_free_host(host->mmc); - } + mmc_remove_host(host->mmc); + mmc_davinci_cpufreq_deregister(host); + davinci_release_dma_channels(host); + clk_disable(host->clk); + mmc_free_host(host->mmc); return 0; }