linux-kernel - Re: [PATCH] dmaengine: dmatest: fix timeout caused by kthread

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Message-ID: <4788bc76-de7f-33fe-0089-c17112fd12c9@huawei.com>
Date:   Mon, 25 Sep 2023 09:10:39 +0800
From:   Jie Hai <haijie1@...wei.com>
To:     <vkoul@...nel.org>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] dmaengine: dmatest: fix timeout caused by kthread_stop

Hi, Vkoul,

Kindly ping...

Thanks,
Jie Hai
On 2023/7/20 19:41, Jie Hai wrote:
> The change introduced by commit a7c01fa93aeb ("signal: break
> out of wait loops on kthread_stop()") causes dmatest aborts
> any ongoing tests and possible failure on the tests. This patch
> use wait_event_timeout instead of wait_event_freezable_timeout
> to avoid interrupting ongoing tests by signal brought by
> kthread_stop().
> 
> Signed-off-by: Jie Hai <haijie1@...wei.com>
> ---
>   drivers/dma/dmatest.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
> index ffe621695e47..c06b8b16645a 100644
> --- a/drivers/dma/dmatest.c
> +++ b/drivers/dma/dmatest.c
> @@ -827,7 +827,7 @@ static int dmatest_func(void *data)
>   		} else {
>   			dma_async_issue_pending(chan);
>   
> -			wait_event_freezable_timeout(thread->done_wait,
> +			ret = wait_event_timeout(thread->done_wait,
>   					done->done,
>   					msecs_to_jiffies(params->timeout));
>