Re: [Linaro-mm-sig] Re: [RFC][PATCH v3 12/33] timers: dma-buf: Use timer_shutdown_sync() before freeing timer

Christian König
2022-11-05T08:13:16Z

Am 04.11.22 um 19:58 schrieb Steven Rostedt:
> On Fri, 4 Nov 2022 08:15:53 +0100
> Christian König <christian.koenig@amd.com> wrote:
>
>>> index fb6e0a6ae2c9..5d3e7b503501 100644
>>> --- a/drivers/dma-buf/st-dma-fence.c
>>> +++ b/drivers/dma-buf/st-dma-fence.c
>>> @@ -412,7 +412,7 @@ static int test_wait_timeout(void *arg)
>>>
>>> err = 0;
>>> err_free:
>>> - del_timer_sync(&wt.timer);
>>> + timer_shutdown_sync(&wt.timer);
>> Mhm, what exactly is the benefit of renaming the function?
>>
>> Not that I'm against the change, but my thinking is more if there are
>> more functions which don't re-arm the time than those which do that then
>> why not forbid it in general?
> Timers are more often re-armed then not. I had to look for the
> locations where del_timer*() was called just before freeing, and other
> locations where they are freed later.
>
> I didn't rename del_timer_sync() to timer_shutdown_sync(), this version
> renamed the new "del_timer_shutdown()" to "timer_shutdown_sync()".
>
> Maybe I'm just confused at what you are asking.

No, that explains it a bit better. I was just wondering what exactly the
different to del_timer_sync() is.

Maybe shorten the summary in the cover letter a bit. The history how
this change came to be is not as interesting as why we are changing
something.

Regards,
Christian.

>
> -- Steve
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