linux-kernel - Re: [PATCH] clk: at91: fix count of periph clocks passed to pmc_data

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Date:   Wed, 9 Jun 2021 10:31:01 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Clément Léger <clement.leger@...tlin.com>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: at91: fix count of periph clocks passed to
 pmc_data_allocate

hi,

Subject should have been:
clk: at91: sama5d2: fix count of periph clocks passed to pmc_data_allocate



On 09/06/2021 10:01:44+0200, Clément Léger wrote:
> When allocating clk_hw structure, only the periph32 clocks are considered.
> Since sama5d2_periphck are also added to the phws there is currently an
> out of bound write. Fix this by adding the count of periphck to periph32ck.
> 
> Signed-off-by: Clément Léger <clement.leger@...tlin.com>
Fixes: a2038077de9a ("clk: at91: add sama5d2 PMC driver")

> ---
>  drivers/clk/at91/sama5d2.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
> index 3d1f78176c3e..663b73a032ee 100644
> --- a/drivers/clk/at91/sama5d2.c
> +++ b/drivers/clk/at91/sama5d2.c
> @@ -170,7 +170,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
>  
>  	sama5d2_pmc = pmc_data_allocate(PMC_AUDIOPLLCK + 1,
>  					nck(sama5d2_systemck),
> -					nck(sama5d2_periph32ck),
> +					nck(sama5d2_periphck) + nck(sama5d2_periph32ck),
>  					nck(sama5d2_gck), 3);
>  	if (!sama5d2_pmc)
>  		return;
> -- 
> 2.32.0
> 

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