I think think this is a run-time check for a programming error,
and the current fashion is to delete the check and take a fault
if this happens so the caller can be fixed.
There are a couple of checks like this in fan.c --
perhaps Rui can clean them up when he comes back next week.
thanks,
Len Brown, Intel Open Source Technology Center
On Thu, 11 Feb 2010, Darren Jenkins wrote:
> In acpi_fan_remove() device is being dereferenced before the NULL test.
> This reorders the code to ensure it is checked for NULL first.
>
> Coverity CID: 2758
>
> Signed-off-by: Darren Jenkins <darrenrjenkins@xxxxxxxxx>
> ---
> drivers/acpi/fan.c | 9 +++++++--
> 1 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
> index acf2ab2..dc39640 100644
> --- a/drivers/acpi/fan.c
> +++ b/drivers/acpi/fan.c
> @@ -298,9 +298,14 @@ static int acpi_fan_add(struct acpi_device *device)
>
> static int acpi_fan_remove(struct acpi_device *device, int type)
> {
> - struct thermal_cooling_device *cdev = acpi_driver_data(device);
> + struct thermal_cooling_device *cdev;
> +
> + if (!device)
> + return -EINVAL;
> +
> + cdev = acpi_driver_data(device);
>
> - if (!device || !cdev)
> + if (!cdev)
> return -EINVAL;
>
> acpi_fan_remove_fs(device);
> --
> 1.6.3.3
>
>
>
>
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