On Tue, Apr 06, 2021 at 07:54:58PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> The call to platform_get_resource can potentially return a NULL pointer
> on failure, so add this check and return -EINVAL if it fails.
>
> Addresses-Coverity: ("Dereference null return")
> Fixes: e95c237d78c0 ("hwmon: (dme1737) Add sch311x support")
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Not really sure what to do with this; it is a false positive.
The resource is always set by the instantiating code (in the same
driver). Adding an error check just to make coverity happy seems
like a waste. Maybe we should introduce the equivalent of
devm_ioremap_resource() for IORESOURCE_IO.
Guenter
> ---
> drivers/hwmon/dme1737.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
> index c1e4cfb40c3d..a2157872e126 100644
> --- a/drivers/hwmon/dme1737.c
> +++ b/drivers/hwmon/dme1737.c
> @@ -2633,6 +2633,8 @@ static int dme1737_isa_probe(struct platform_device *pdev)
> int err;
>
> res = platform_get_resource(pdev, IORESOURCE_IO, 0);
> + if (!res)
> + return -EINVAL;
> if (!devm_request_region(dev, res->start, DME1737_EXTENT, "dme1737")) {
> dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
> (unsigned short)res->start,
