On Mon, 11 Jun 2018, Zhouyang Jia wrote:
> When sysfs_create_group fails, the lack of error-handling code may
> cause unexpected results.
>
> This patch adds error-handling code after calling sysfs_create_group.
>
> Signed-off-by: Zhouyang Jia <jiazhouyang09@xxxxxxxxx>
> ---
> drivers/hid/hid-ntrig.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
> index 43b1c72..1e70dae 100644
> --- a/drivers/hid/hid-ntrig.c
> +++ b/drivers/hid/hid-ntrig.c
> @@ -955,6 +955,10 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
>
> ret = sysfs_create_group(&hdev->dev.kobj,
> &ntrig_attribute_group);
> + if (ret) {
> + hid_err(hdev, "cannot create sysfs group\n");
> + goto err_free;
> + }
Is it really necessarily to bail out completely here and render the device
dysfunctional? Issuing a warning about sysfs knobs being unavailable might
be more appropriate.
Thanks,
--
Jiri Kosina
SUSE Labs
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