linux-kernel - Re: [PATCH 1/2] Input: tegra-kbc: Handle return value of clk_prepare

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Message-ID: <20170831185105.GD14370@dtor-ws>
Date:   Thu, 31 Aug 2017 11:51:05 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     riyer@...dia.com, ldewangan@...dia.com, thierry.reding@...il.com,
        jonathanh@...dia.com, linux-input@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] Input: tegra-kbc: Handle return value of
 clk_prepare_enable.

On Tue, Aug 01, 2017 at 03:32:26PM +0530, Arvind Yadav wrote:
> clk_prepare_enable() can fail here and we must check its return value.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

Applied, thank you.

> ---
>  drivers/input/keyboard/tegra-kbc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
> index 0c07e10..edc1385 100644
> --- a/drivers/input/keyboard/tegra-kbc.c
> +++ b/drivers/input/keyboard/tegra-kbc.c
> @@ -370,8 +370,11 @@ static int tegra_kbc_start(struct tegra_kbc *kbc)
>  {
>  	unsigned int debounce_cnt;
>  	u32 val = 0;
> +	int ret;
>  
> -	clk_prepare_enable(kbc->clk);
> +	ret = clk_prepare_enable(kbc->clk);
> +	if (ret)
> +		return ret;
>  
>  	/* Reset the KBC controller to clear all previous status.*/
>  	reset_control_assert(kbc->rst);
> -- 
> 1.9.1
> 

-- 
Dmitry