linux-kernel - Re: [PATCH 3/4] rtc: sun6i: Don't reference clk_init

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Message-ID: <20190816145022.GD3545@piout.net>
Date:   Fri, 16 Aug 2019 16:50:22 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-rtc@...r.kernel.org, Alessandro Zummo <a.zummo@...ertech.it>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>
Subject: Re: [PATCH 3/4] rtc: sun6i: Don't reference clk_init_data after
 registration

On 15/08/2019 09:00:19-0700, Stephen Boyd wrote:
> A future patch is going to change semantics of clk_register() so that
> clk_hw::init is guaranteed to be NULL after a clk is registered. Avoid
> referencing this member here so that we don't run into NULL pointer
> exceptions.
> 
> Cc: Alessandro Zummo <a.zummo@...ertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>
> Cc: Maxime Ripard <maxime.ripard@...tlin.com>
> Cc: Chen-Yu Tsai <wens@...e.org>
> Signed-off-by: Stephen Boyd <sboyd@...nel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

> ---
> 
> Please ack so I can take this through clk tree.
> 
>  drivers/rtc/rtc-sun6i.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
> index c0e75c373605..d50ee023b559 100644
> --- a/drivers/rtc/rtc-sun6i.c
> +++ b/drivers/rtc/rtc-sun6i.c
> @@ -279,7 +279,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>  
>  	of_property_read_string_index(node, "clock-output-names", 1,
>  				      &clkout_name);
> -	rtc->ext_losc = clk_register_gate(NULL, clkout_name, rtc->hw.init->name,
> +	rtc->ext_losc = clk_register_gate(NULL, clkout_name, init.name,
>  					  0, rtc->base + SUN6I_LOSC_OUT_GATING,
>  					  SUN6I_LOSC_OUT_GATING_EN_OFFSET, 0,
>  					  &rtc->lock);
> -- 
> Sent by a computer through tubes
> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com