linux-kernel - RE: [PATCH net-next v2 2/2] misc: Add Renesas Synchronization Management Unit (SMU) support

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Date:   Wed, 7 Apr 2021 19:56:22 +0000
From:   Min Li <min.li.xe@...esas.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "derek.kiernan@...inx.com" <derek.kiernan@...inx.com>,
        "dragan.cvetic@...inx.com" <dragan.cvetic@...inx.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH net-next v2 2/2] misc: Add Renesas Synchronization
 Management Unit (SMU) support

> 
> If you do nothing in an open/release function, then there is no need to have
> them at all, you can remove them.
> 
> But this feels odd, how do you know what device you are using in your ioctl
> command?
> 

The type of board is passed by mfd driver through platform data

rsmu->type = pdata->type;