linux-kernel - Re: [PATCH v2 net-next] ptp: Fix pass zero to ERR_PTR() in ptp_clock

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Date:   Fri, 23 Nov 2018 08:37:14 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     davem@...emloft.net, dmitry.torokhov@...il.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next] ptp: Fix pass zero to ERR_PTR() in
 ptp_clock_register

On Fri, Nov 23, 2018 at 09:54:55AM +0800, YueHaibing wrote:
> @@ -264,6 +266,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
>  		pps.owner = info->owner;
>  		ptp->pps_source = pps_register_source(&pps, PTP_PPS_DEFAULTS);
>  		if (!ptp->pps_source) {
> +			err = -EINVAL;

Bonus points:  The function, pps_register_source(), keeps error codes
in a local variable, but it does not make use of the code.  There are
only five callers of that function, and so it would be nice to let
pps_register_source() return the error code.

For the present patch:

Acked-by: Richard Cochran <richardcochran@...il.com>