linux-kernel - Re: [PATCH v1] clk: mediatek: assign the initial value to clk_init_data of mtk

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Date:   Mon, 25 May 2020 11:08:30 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Weiyi Lu <weiyi.lu@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     James Liao <jamesjj.liao@...iatek.com>,
        srv_heupstream@...iatek.com, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Fan Chen <fan.chen@...iatek.com>,
        linux-mediatek@...ts.infradead.org,
        Owen Chen <owen.chen@...iatek.com>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1] clk: mediatek: assign the initial value to
 clk_init_data of mtk_mux



On 25/05/2020 08:41, Weiyi Lu wrote:
> It'd be dangerous when struct clk_core have new memebers.
> Add the missing initial value to clk_init_data.
> 

Sorry I don't really understand this commit message, can please explain.
In any case if this is a problem, then we probably we should fix it for all drivers.
Apart from drivers/clk/mediatek/clk-cpumux.c

It's a widely used pattern:
$ git grep "struct clk_init_data init;"| wc -l
235

Regards,
Matthias

> Fixes: a3ae549917f1 ("clk: mediatek: Add new clkmux register API")
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Weiyi Lu <weiyi.lu@...iatek.com>
> ---
>  drivers/clk/mediatek/clk-mux.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/mediatek/clk-mux.c b/drivers/clk/mediatek/clk-mux.c
> index 76f9cd0..14e127e 100644
> --- a/drivers/clk/mediatek/clk-mux.c
> +++ b/drivers/clk/mediatek/clk-mux.c
> @@ -160,7 +160,7 @@ struct clk *mtk_clk_register_mux(const struct mtk_mux *mux,
>  				 spinlock_t *lock)
>  {
>  	struct mtk_clk_mux *clk_mux;
> -	struct clk_init_data init;
> +	struct clk_init_data init = {};
>  	struct clk *clk;
>  
>  	clk_mux = kzalloc(sizeof(*clk_mux), GFP_KERNEL);
>