linux-kernel - Re: [patch] hp_accel: Silence an uninitialized variable warning

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Date:	Fri, 15 Apr 2016 08:29:59 -0700
From:	Darren Hart <dvhart@...radead.org>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Eric Piel <eric.piel@...mplin-utc.net>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] hp_accel: Silence an uninitialized variable warning

On Fri, Apr 15, 2016 at 05:47:20PM +0300, Dan Carpenter wrote:
> If acpi_evaluate_integer() fails then "lret" isn't initialized.  I've
> tweaked the error handling to avoid this issue.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Thanks Dan, I verified and queued all 3 patches to fixes for 4.6.

> 
> diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c
> index 10ce6cb..746918e 100644
> --- a/drivers/platform/x86/hp_accel.c
> +++ b/drivers/platform/x86/hp_accel.c
> @@ -127,8 +127,10 @@ static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
>  	arg0.integer.value = reg;
>  
>  	status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
> +	if (ACPI_FAILURE(status))
> +		return -EINVAL;
>  	*ret = lret;
> -	return (status != AE_OK) ? -EINVAL : 0;
> +	return 0;
>  }
>  
>  /**
> 

-- 
Darren Hart
Intel Open Source Technology Center