linux-kernel - Re: [PATCH] arm: mach-omap2: omap4-common: Fix refcount leak bug

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Date:   Tue, 28 Jun 2022 07:38:49 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Liang He <windhl@....com>
Cc:     linux@...linux.org.uk, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm: mach-omap2: omap4-common: Fix refcount leak bug

* Liang He <windhl@....com> [220617 06:51]:
> In omap4_sram_init(), of_find_compatible_node() will return a node
> pointer with refcount incremented. We should use of_node_put() when
> it is not used anymore.
> 
> Signed-off-by: Liang He <windhl@....com>
> ---
>  arch/arm/mach-omap2/omap4-common.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
> index 6d1eb4eefefe..e981bf57e64f 100644
> --- a/arch/arm/mach-omap2/omap4-common.c
> +++ b/arch/arm/mach-omap2/omap4-common.c
> @@ -135,6 +135,7 @@ static int __init omap4_sram_init(void)
>  		pr_warn("%s:Unable to allocate sram needed to handle errata I688\n",
>  			__func__);
>  	sram_pool = of_gen_pool_get(np, "sram", 0);
> +	of_node_put(np);
>  	if (!sram_pool)
>  		pr_warn("%s:Unable to get sram pool needed to handle errata I688\n",
>  			__func__);

Here too sram_pool is used aftger of_node_put().

Regards,

Tony