Re: [PATCH 2/2] usnic: do not ignore return value of __ethtool_get_link_ksettings

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

[-- Attachment #1: Type: text/plain, Size: 1839 bytes --]

On Thu, Jul 13, 2017 at 03:46:25PM -0700, Govindarajulu Varadarajan wrote:
> Do not ignore the return value of the caller.
>
> Signed-off-by: Govindarajulu Varadarajan <gvaradar-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
> index 03002bac93e7..c0b82a990bc9 100644
> --- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
> +++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
> @@ -327,13 +327,16 @@ int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
>  {
>  	struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
>  	struct ethtool_link_ksettings cmd;
> +	int err = 0;

Please don't assign variable which will be overwritten immediately.
It has potential to hide the errors.

Thanks

>
>  	usnic_dbg("\n");
>
>  	mutex_lock(&us_ibdev->usdev_lock);
>  	rtnl_lock();
> -	__ethtool_get_link_ksettings(us_ibdev->netdev, &cmd);
> +	err = __ethtool_get_link_ksettings(us_ibdev->netdev, &cmd);
>  	rtnl_unlock();
> +	if (err)
> +		goto out;
>  	/* props being zeroed by the caller, avoid zeroing it here */
>
>  	props->lid = 0;
> @@ -364,9 +367,10 @@ int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
>  	/* Userspace will adjust for hdrs */
>  	props->max_msg_sz = us_ibdev->ufdev->mtu;
>  	props->max_vl_num = 1;
> +out:
>  	mutex_unlock(&us_ibdev->usdev_lock);
>
> -	return 0;
> +	return err;
>  }
>
>  int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
> --
> 2.13.2
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]