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ptp: Fix pass zero to ERR_PTR() in ptp_clock_register 

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: 85a66e5501 ("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>
This commit is contained in:
YueHaibing 2018-11-23 09:54:55 +08:00 committed by David S. Miller
parent 06d212900e
commit aea0a897af
1 changed files with 4 additions and 1 deletions
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5
drivers/ptp/ptp_clock.c
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@ -252,8 +252,10 @@ 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) {
@ -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;
pr_err("failed to register pps source\n");
goto no_pps;
}