* [patch] hp_accel: Silence an uninitialized variable warning
@ 2016-04-15 14:47 Dan Carpenter
2016-04-15 15:29 ` Darren Hart
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2016-04-15 14:47 UTC (permalink / raw)
To: Eric Piel; +Cc: Darren Hart, platform-driver-x86, linux-kernel, kernel-janitors
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@oracle.com>
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;
}
/**
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [patch] hp_accel: Silence an uninitialized variable warning
2016-04-15 14:47 [patch] hp_accel: Silence an uninitialized variable warning Dan Carpenter
@ 2016-04-15 15:29 ` Darren Hart
0 siblings, 0 replies; 2+ messages in thread
From: Darren Hart @ 2016-04-15 15:29 UTC (permalink / raw)
To: Dan Carpenter
Cc: Eric Piel, platform-driver-x86, linux-kernel, kernel-janitors
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@oracle.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
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