linux-kernel - Re: [char-misc-next 1/2] mei: add check for offline bit in every register access

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Message-ID: <2023112706-abroad-gangway-f7d2@gregkh>
Date:   Mon, 27 Nov 2023 13:38:18 +0000
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        Vitaly Lubart <vitaly.lubart@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [char-misc-next 1/2] mei: add check for offline bit in every
 register access

On Wed, Oct 18, 2023 at 01:10:23PM +0300, Tomas Winkler wrote:
> From: Vitaly Lubart <vitaly.lubart@...el.com>
> 
> Added check for offline in every register access function.
> When offline bit is set the driver should not access any mei hw.
> 
> Signed-off-by: Vitaly Lubart <vitaly.lubart@...el.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> ---
>  drivers/misc/mei/hw-me.c | 154 +++++++++++++++++++++++++++++++++++++--
>  1 file changed, 146 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
> index d11a0740b47c96c33591e69a..565da19bb980c845bc2cf3ed 100644
> --- a/drivers/misc/mei/hw-me.c
> +++ b/drivers/misc/mei/hw-me.c
> @@ -58,6 +58,9 @@ static inline void mei_me_reg_write(const struct mei_me_hw *hw,
>   */
>  static inline u32 mei_me_mecbrw_read(const struct mei_device *dev)
>  {
> +	if (dev->dev->offline)
> +		return 0;

Dropped from my review queue due to lack of response :(