linux-kernel - Re: [PATCH] clk: keystone: gate: fix clk_init

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Date:	Thu, 30 Jan 2014 15:49:26 +0200
From:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
To:	"Shilimkar, Santosh" <santosh.shilimkar@...com>
CC:	"mturquette@...aro.org" <mturquette@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: keystone: gate: fix clk_init_data initialization

Yes. As result the clk->flag field contains garbage. In my case it leads
that flag CLK_IGNORE_UNUSED is set for most of clocks.  As result a bunch
of unused clocks cannot be disabled.

On 01/30/2014 03:26 PM, Shilimkar, Santosh wrote:
> Can u capture the issue withiout this fix?
>
> Sent from my Android phone using TouchDown (www.nitrodesk.com)
>
> -----Original Message-----
> *From:* Khoronzhuk, Ivan [ivan.khoronzhuk@...com]
> *Received:* Thursday, 30 Jan 2014, 6:37am
> *To:* Shilimkar, Santosh [santosh.shilimkar@...com]
> *CC:* mturquette@...aro.org [mturquette@...aro.org];
> linux-arm-kernel@...ts.infradead.org [linux-arm-kernel@...ts.infradead.org];
> linux-kernel@...r.kernel.org [linux-kernel@...r.kernel.org]; Khoronzhuk, Ivan
> [ivan.khoronzhuk@...com]
> *Subject:* [PATCH] clk: keystone: gate: fix clk_init_data initialization
>
> In clk_register_psc() function clk_init_data struct is allocated
> in the stack. All members of this struct should be initialized
> before using otherwise it will contain garbage. So initialize flags
> in this structure too.
>
> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...com>
> ---
>    drivers/clk/keystone/gate.c | 1 +
>    1 file changed, 1 insertion(+)
>
> diff --git a/drivers/clk/keystone/gate.c b/drivers/clk/keystone/gate.c
> index 17a5983..86f1e36 100644
> --- a/drivers/clk/keystone/gate.c
> +++ b/drivers/clk/keystone/gate.c
> @@ -179,6 +179,7 @@ static struct clk *clk_register_psc(struct device *dev,
>
>            init.name = name;
>            init.ops = &clk_psc_ops;
> +       init.flags = 0;
>            init.parent_names = (parent_name ? &parent_name : NULL);
>            init.num_parents = (parent_name ? 1 : 0);
>
> -- 
> 1.8.3.2
>

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