Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751812AbaKYWem (ORCPT ); Tue, 25 Nov 2014 17:34:42 -0500 Received: from coldplug.net ([109.75.184.172]:49315 "EHLO external.coldplug.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751169AbaKYWel (ORCPT ); Tue, 25 Nov 2014 17:34:41 -0500 Message-ID: <547503EA.3030907@coldplug.net> Date: Tue, 25 Nov 2014 23:34:18 +0100 From: lautriv User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Ulf Hansson CC: Alexey Charkov , Fabio Estevam , Tony Prisk , Chris Ball , "linux-arm-kernel@lists.infradead.org" , "linux-mmc@vger.kernel.org" , linux-kernel Subject: Re: [PATCH] mmc: wmt-sdmmc: fix unmatched release_mem_region References: <1415567571-6144-1-git-send-email-alchark@gmail.com> <545FE821.5060107@coldplug.net> <546DFE83.8060900@coldplug.net> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/24/2014 09:34 AM, Ulf Hansson wrote: > On 20 November 2014 at 15:45, lautriv wrote: >> From b0509e27e33326e6dccd67d8ebe67e2bdb0cfdde Mon Sep 17 00:00:00 2001 >> From: Helmut Stengele >> Date: Thu, 20 Nov 2014 15:27:40 +0100 >> Subject: [PATCH] mmc: wmt-sdmmc: fix unmatched release_mem_region >> >> Current code calls release_mem_region upon module unload >> without requesting the region first. This patch fixes it >> by moving to a devres-based ioremap implementation, which >> handles requesting and releasing memory region internally. >> >> This also makes the error/unload paths a bit simpler. >> >> Signed-off-by: Helmut Stengele >> --- >> >> This is a corrected patch based on the one Alexey sent for me. >> I sent it already but since i'm not used to send something upstream >> it was an attached file and obviously rejected. >> Patch is tested on bare-metal ( wm8850 ) and works like suspected. >> >> drivers/mmc/host/wmt-sdmmc.c | 14 +++++--------- >> 1 file changed, 5 insertions(+), 9 deletions(-) >> >> diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c >> index 54181b4..bcaa0cc 100644 >> --- a/drivers/mmc/host/wmt-sdmmc.c >> +++ b/drivers/mmc/host/wmt-sdmmc.c >> @@ -759,6 +759,7 @@ static int wmt_mci_probe(struct platform_device *pdev) >> const struct wmt_mci_caps *wmt_caps; >> int ret; >> int regular_irq, dma_irq; >> + struct resource *res; >> >> if (!of_id || !of_id->data) { >> dev_err(&pdev->dev, "Controller capabilities data missing\n"); >> @@ -813,10 +814,11 @@ static int wmt_mci_probe(struct platform_device *pdev) >> if (of_get_property(np, "cd-inverted", NULL)) >> priv->cd_inverted = 1; >> >> - priv->sdmmc_base = of_iomap(np, 0); >> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> + priv->sdmmc_base = devm_ioremap_resource(&pdev->dev, res); > You should check the return value from devm_ioremap_resource() with IS_ERR(). > >> if (!priv->sdmmc_base) { >> dev_err(&pdev->dev, "Failed to map IO space\n"); > This print can be removed, devm_ioremap_resource() handles that. > >> - ret = -ENOMEM; >> + ret = PTR_ERR(priv->sdmmc_base); >> goto fail2; >> } >> >> @@ -826,7 +828,7 @@ static int wmt_mci_probe(struct platform_device *pdev) >> ret = request_irq(regular_irq, wmt_mci_regular_isr, 0, "sdmmc", priv); >> if (ret) { >> dev_err(&pdev->dev, "Register regular IRQ fail\n"); >> - goto fail3; >> + goto fail2; >> } >> >> ret = request_irq(dma_irq, wmt_mci_dma_isr, 0, "sdmmc", priv); >> @@ -869,8 +871,6 @@ fail5: >> free_irq(dma_irq, priv); >> fail4: >> free_irq(regular_irq, priv); >> -fail3: >> - iounmap(priv->sdmmc_base); >> fail2: >> mmc_free_host(mmc); >> fail1: >> @@ -881,7 +881,6 @@ static int wmt_mci_remove(struct platform_device *pdev) >> { >> struct mmc_host *mmc; >> struct wmt_mci_priv *priv; >> - struct resource *res; >> u32 reg_tmp; >> >> mmc = platform_get_drvdata(pdev); >> @@ -909,9 +908,6 @@ static int wmt_mci_remove(struct platform_device *pdev) >> clk_disable_unprepare(priv->clk_sdmmc); >> clk_put(priv->clk_sdmmc); >> >> - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> - release_mem_region(res->start, resource_size(res)); >> - >> mmc_free_host(mmc); >> >> dev_info(&pdev->dev, "WMT MCI device removed\n"); >> -- >> 2.1.3 >> >> > Kind regards > Uffe > Thanks for the hint, will do so. ( Sent the wrong patch by accident anyway ) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/