From patchwork Thu Mar 17 03:45:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 8607031 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6643C9F6E1 for ; Thu, 17 Mar 2016 03:49:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8089720279 for ; Thu, 17 Mar 2016 03:49:42 +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 8EC8E2026F for ; Thu, 17 Mar 2016 03:49:41 +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 1agOuv-0004L4-Vj; Thu, 17 Mar 2016 03:48:10 +0000 Received: from [50.115.127.205] (helo=vern.gendns.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1agOtj-0002zv-NE for linux-arm-kernel@lists.infradead.org; Thu, 17 Mar 2016 03:47:03 +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=VIyQr1CFIPSpPqdYTaoKeLzS4QSKNCPoYkgDpOouQsQ=; b=NZse7NTf86sJT H6eMVU/lf47BrJRIh5jgYDrpUJvvg6JA2rGMYt9KQ+kje7HFB+vfiozEO60iHBmJ2GkHrQoLv9ng/ YPoOwBjf5OBstInK6SOgld73e0q8tBlX46VV3ogc1HU7wo5YJeqZVUH2YpvQt2BYoePuYL0gnDbAX J9wSPdK2lbyzfHhM3Vr8tT3+N+0I+gFZ63Ae52VxaltyEzT+KlORn1Lzea4kH3m1KVJ44bYbrm379 Zo0zJuvu6pen3uk6KXSDiBjKXub3ctxVVRlsa4sArLyZa8l3Lo305EEeXaxXkJ526vq7w8M88jX90 4RRW+nw78nDUrvQDJFp7w==; Received: from 108-198-5-147.lightspeed.okcbok.sbcglobal.net ([108.198.5.147]:51767 helo=freyr.lechnology.com) by vern.gendns.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-SHA256:128) (Exim 4.86_1) (envelope-from ) id 1agOtL-004EFV-1Y; Wed, 16 Mar 2016 23:46:31 -0400 From: David Lechner To: Subject: [PATCH v3 3/5] mmc: davinci: fix unwinding in probe Date: Wed, 16 Mar 2016 22:45:33 -0500 Message-Id: <1458186341-6970-4-git-send-email-david@lechnology.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1458186341-6970-1-git-send-email-david@lechnology.com> References: <1458186341-6970-1-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-20160316_204656_118160_3A52ABCB X-CRM114-Status: GOOD ( 10.69 ) X-Spam-Score: -0.5 (/) 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 , Russell King , David Lechner , Kevin Hilman , Krzysztof Kozlowski , Sekhar Nori , linux-kernel@vger.kernel.org, Jaehoon Chung , linux-mmc@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 --- v3 changes: fixed ret = -ENODEV mistake. Updated to apply on top of patch from Peter Ujfalusi. drivers/mmc/host/davinci_mmc.c | 96 ++++++++++++++++-------------------------- 1 file changed, 37 insertions(+), 59 deletions(-) diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index 498c42d..e75407d 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -1205,7 +1205,7 @@ 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; @@ -1215,38 +1215,38 @@ 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; + return -ENOMEM; host = mmc_priv(mmc); host->mmc = mmc; /* Important */ 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); @@ -1264,7 +1264,7 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) if (host->use_dma) { ret = davinci_acquire_dma_channels(host); if (ret == -EPROBE_DEFER) - goto out; + goto dma_probe_defer; else if (ret) host->use_dma = 0; } @@ -1321,15 +1321,17 @@ 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; } @@ -1342,28 +1344,18 @@ 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); +dma_probe_defer: + clk_disable(host->clk); +clk_enable_fail: +clk_get_fail: +ioremap_fail: + mmc_free_host(mmc); return ret; } @@ -1372,25 +1364,11 @@ 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; }