ptp: Fix pass zero to ERR_PTR() in ptp_clock_register

[ Upstream commit aea0a897af9e44c258e8ab9296fad417f1bc063a ]

Fix smatch warning:

drivers/ptp/ptp_clock.c:298 ptp_clock_register() warn:
 passing zero to 'ERR_PTR'

'err' should be set while device_create_with_groups and
pps_register_source fails

Fixes: 85a66e550195 ("ptp: create "pins" together with the rest of attributes")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index 7eacc1c..c64903a 100644 (file)
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -253,8 +253,10 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
        ptp->dev = device_create_with_groups(ptp_class, parent, ptp->devid,
                                             ptp, ptp->pin_attr_groups,
                                             "ptp%d", ptp->index);
-       if (IS_ERR(ptp->dev))
+       if (IS_ERR(ptp->dev)) {
+               err = PTR_ERR(ptp->dev);
                goto no_device;
+       }
 
        /* Register a new PPS source. */
        if (info->pps) {
@@ -265,6 +267,7 @@ 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;
                        pr_err("failed to register pps source\n");
                        goto no_pps;
                }