linux-kernel - Re: [PATCH] mfd: max77620: Fix FPS switch statements

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Date:	Tue, 7 Jun 2016 09:05:38 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Rhyland Klein <rklein@...dia.com>
Cc:	Laxman Dewangan <ldewangan@...dia.com>,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: max77620: Fix FPS switch statements

On Thu, 12 May 2016, Rhyland Klein wrote:

> When configuring FPS during probe, assuming a DT node is present for
> FPS, the code can run into a problem with the switch statements in
> max77620_config_fps() and max77620_get_fps_period_reg_value(). Namely,
> in the case of chip->chip_id == MAX77620, it will set
> fps_[mix|max]_period but then fall through to the default switch case
> and return -EINVAL. Returning this from max77620_config_fps() will
> cause probe to fail.
> 
> Signed-off-by: Rhyland Klein <rklein@...dia.com>
> ---
>  drivers/mfd/max77620.c | 2 ++
>  1 file changed, 2 insertions(+)

Applied to -fixes with Thierry and Laxman's Acks.

> diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
> index 199d261990be..f32fbb8e8129 100644
> --- a/drivers/mfd/max77620.c
> +++ b/drivers/mfd/max77620.c
> @@ -203,6 +203,7 @@ static int max77620_get_fps_period_reg_value(struct max77620_chip *chip,
>  		break;
>  	case MAX77620:
>  		fps_min_period = MAX77620_FPS_PERIOD_MIN_US;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -236,6 +237,7 @@ static int max77620_config_fps(struct max77620_chip *chip,
>  		break;
>  	case MAX77620:
>  		fps_max_period = MAX77620_FPS_PERIOD_MAX_US;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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