Hi
>
> On Mon, Nov 02, 2020 at 10:26:22PM +0800, Zhang Qilong wrote:
> > pm_runtime_get_sync will increment pm usage counter even it failed.
> > Forgetting to pm_runtime_put_noidle will result in reference leak in
> > cedrus_start_streaming. We should fix it.
> >
> > Fixes: d5aecd289babf ("media: cedrus: Implement runtime PM")
> > Signed-off-by: Zhang Qilong <[email protected]>
>
> Shouldn't we fix pm_runtime_get_sync instead then? It seems that most of the
> callers get this wrong, and that's definitely non-obvious.
>
I have ever thought to fix fix pm_runtime_get_sync, then I went to read the
comment on this function, and found that this is what the author intended to
do(comment: The possible return values of this function are the same as for
pm_runtime_resume() and the runtime PM usage counter of @dev remains
incremented in all cases, even if it returns an error code). On the other hand,
I found that the number of callers that getting this right is much bigger than
getting this wrong even many callers get wrong. So I submit server patches to
fix them as I could.
Thanks, best wish!
Zhang Qilong
> Maxime
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