linux-kernel - Re: Re: Re: [PATCH] [v2] media: staging: tegra-vde: fix runtime pm imbalance on error

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Message-ID: <10fd55e1.bbe50.172372e9216.Coremail.dinghao.liu@zju.edu.cn>
Date:   Thu, 21 May 2020 20:21:38 +0800 (GMT+08:00)
From:   dinghao.liu@....edu.cn
To:     "Dan Carpenter" <dan.carpenter@...cle.com>
Cc:     devel@...verdev.osuosl.org,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>, kjlu@....edu,
        linux-kernel@...r.kernel.org,
        "Jonathan Hunter" <jonathanh@...dia.com>,
        "Thierry Reding" <thierry.reding@...il.com>,
        linux-tegra@...r.kernel.org, "Dmitry Osipenko" <digetx@...il.com>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
        linux-media@...r.kernel.org
Subject: Re: Re: Re: [PATCH] [v2] media: staging: tegra-vde: fix runtime pm
 imbalance on error

Sorry, I misunderstood your idea before. A new function is 
the best solution for this problem.

Regards,
Dinghao

&quot;Dan Carpenter&quot; &lt;dan.carpenter@...cle.com&gt;写道：
> On Thu, May 21, 2020 at 07:42:56PM +0800, dinghao.liu@....edu.cn wrote:
> > We need to make sure if pm_runtime_get_sync() is designed with
> > such behavior before modifying it.  
> > 
> > I received a response from Rafael when I commited a similar patch:
> > https://lkml.org/lkml/2020/5/20/1100
> > It seems that this behavior is intentional and needs to be kept.
> 
> Yes.  This is why I have said twice or three times to not change
> pm_runtime_get_sync() but instead to write a replacement.
> 
> A large percent of the callers are buggy.  The pm_runtime_get_sync() is
> a -4 on Rusty's API scale.
> http://sweng.the-davies.net/Home/rustys-api-design-manifesto
> One could argue that anything above a -4 is really a 2 if you read
> the implementation thouroughly enough...
> 
> regards,
> dan carpenter
>