linux-kernel - Re: [PATCH] memory/tegra: Add missing of_node_get() in tegra_emc_find_node_by_ram

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Message-ID: <2f3e843e-b72b-ee71-7465-b2b6c8d51b0d@linaro.org>
Date:   Wed, 22 Jun 2022 10:41:28 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Liang He <windhl@....com>, thierry.reding@...il.com,
        jonathanh@...dia.com
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH] memory/tegra: Add missing of_node_get() in
 tegra_emc_find_node_by_ram_code

On 22/06/2022 06:28, Liang He wrote:
> of_find_node_by_name() will decrease the refcount of its first arg and
> we need to add a of_node_put() to keep refcount balance.
> 
> Besides, during the 'for' loop execution, the refcount of 'np' will be
> automatically increased and decreased. There is no need to call
> of_node_put() again.
> 
> Signed-off-by: Liang He <windhl@....com>
> ---
>  drivers/memory/tegra/tegra20-emc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 

The patch was not even compiled... I consider it harmful approach. NAK.
See: https://lwn.net/Articles/854645/

Best regards,
Krzysztof