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Date:   Fri, 9 Sep 2022 17:08:21 +0800
From:   Herbert Xu <herbert@gondor.apana.org.au>
To:     Koba Ko <koba.ko@canonical.com>
Cc:     Tom Lendacky <thomas.lendacky@amd.com>,
        John Allen <john.allen@amd.com>,
        "David S. Miller" <davem@davemloft.net>,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH V3] crypto: ccp - Release dma channels before dmaengine
 unrgister
Message-ID: <YxsCheU982Xqkuhx@gondor.apana.org.au>
References: <20220901144712.1192698-1-koba.ko@canonical.com>
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On Thu, Sep 01, 2022 at 10:47:12PM +0800, Koba Ko wrote:
> A warning is shown during shutdown,
> 
> __dma_async_device_channel_unregister called while 2 clients hold a reference
> WARNING: CPU: 15 PID: 1 at drivers/dma/dmaengine.c:1110 __dma_async_device_channel_unregister+0xb7/0xc0
> 
> Call dma_release_channel for occupied channles before dma_async_device_unregister.
> 
> Fixes: 54cce8ecb925 ("crypto: ccp - ccp_dmaengine_unregister release dma channels")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Koba Ko <koba.ko@canonical.com>
> Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
> 
> ---
> V2: Fix the unused warning
> V3: Fix the Fixes: tag.
> ---
>  drivers/crypto/ccp/ccp-dmaengine.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)

Patch applied.  Thanks. 
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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