linux-kernel - Re: [PATCH/RFC] driver core: Postpone DMA tear-down until after devres release

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Message-ID: <20190208164019.GY32526@8bytes.org>
Date:   Fri, 8 Feb 2019 17:40:19 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Robin Murphy <robin.murphy@....com>,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH/RFC] driver core: Postpone DMA tear-down until after
 devres release

Hi Geert,

On Thu, Feb 07, 2019 at 08:36:53PM +0100, Geert Uytterhoeven wrote:
> diff --git a/drivers/base/dd.c b/drivers/base/dd.c
> index 8ac10af17c0043a3..d62487d024559620 100644
> --- a/drivers/base/dd.c
> +++ b/drivers/base/dd.c
> @@ -968,9 +968,9 @@ static void __device_release_driver(struct device *dev, struct device *parent)
>  			drv->remove(dev);
>  
>  		device_links_driver_cleanup(dev);
> -		arch_teardown_dma_ops(dev);
>  
>  		devres_release_all(dev);
> +		arch_teardown_dma_ops(dev);
>  		dev->driver = NULL;
>  		dev_set_drvdata(dev, NULL);
>  		if (dev->pm_domain && dev->pm_domain->dismiss)

Thanks for the fix! Should it also be tagged for stable and get a Fixes
tag? I know it only triggers with a fix in v5.0-rc, but still...

Regards,

	Joerg