Re: [PATCH] media: vimc: streamer: if kthread_stop fails, ignore the error

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On 1/13/20 4:59 PM, Dafna Hirschfeld wrote:
> Ignore errors returned from kthread_stop since the
> vimc subdevices should still be notified that
> streaming stopped so they can release the memory for
> the streaming, and also kthread should be set to NULL.
> kthread_stop can return -EINTR in case the thread
> did not yet ran. This can happen if userspace calls
> streamon and streamoff right after.
> 
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
> ---
>  drivers/media/platform/vimc/vimc-streamer.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/vimc/vimc-streamer.c b/drivers/media/platform/vimc/vimc-streamer.c
> index cd6b55433c9e..5c5d3c068398 100644
> --- a/drivers/media/platform/vimc/vimc-streamer.c
> +++ b/drivers/media/platform/vimc/vimc-streamer.c
> @@ -216,8 +216,7 @@ int vimc_streamer_s_stream(struct vimc_stream *stream,
>  
>  		ret = kthread_stop(stream->kthread);

Could you add a comment here too? To make it clean in the code why we are ignoring this error?

>  		if (ret)
> -			return ret;
> -

No need to remove this line.

> +			dev_warn(ved->dev, "kthread_stop returned '%d'\n", ret);
>  		stream->kthread = NULL;
>  
>  		vimc_streamer_pipeline_terminate(stream);
> 

Thanks
Helen



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