linux-kernel - RE: [PATCH V2] firmware: imx: Skip return value check for some special SCU firmware APIs

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Date:   Wed, 9 Oct 2019 08:28:44 +0000
From:   Anson Huang <anson.huang@....com>
To:     Marco Felsch <m.felsch@...gutronix.de>
CC:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        Aisheng Dong <aisheng.dong@....com>,
        Leonard Crestez <leonard.crestez@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V2] firmware: imx: Skip return value check for some
 special SCU firmware APIs

Hi, Marco

> On 19-10-08 00:48, Anson Huang wrote:
> > Hi, Marco
> >
> > > On 19-10-07 09:15, Anson Huang wrote:
> > > > The SCU firmware does NOT always have return value stored in
> > > > message header's function element even the API has response data,
> > > > those special APIs are defined as void function in SCU firmware,
> > > > so they should be treated as return success always.
> > > >
> > > > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > > > ---
> > > > Changes since V1:
> > > > 	- Use direct API check instead of calling another function to check.
> > > > 	- This patch is based on
> > > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2F
> > > > patc
> > > >
> > >
> hwork.kernel.org%2Fpatch%2F11129553%2F&amp;data=02%7C01%7Canson.
> > > huang%
> > > >
> > >
> 40nxp.com%7C2de0a6be69b74cc249ad08d74afc9730%7C686ea1d3bc2b4c6f
> > > a92cd99
> > > >
> > >
> c5c301635%7C0%7C0%7C637060321046247040&amp;sdata=RMFAdLKGKb6
> > > mEdhycrzHX
> > > > R03E6Qr5pWyRc8Zk6ErlBc%3D&amp;reserved=0
> > >
> > > Thanks for this v2. It would be good to change the callers within this
> series.
> >
> > NOT quite understand your point, the callers does NOT need to be
> > changed, those
> > 2 special APIs callers are already following the right way of calling the APIs.
> 
> Ah okay. I searched the 5.4-rc2 tag and found the soc_uid_show() as only
> user but this user sets the have_resp field to false. Is this intended?

I already fixed it and patch applied by Shawn, see below:

https://patchwork.kernel.org/patch/11129497/

Anson