diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/sysfs.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/rtc/sysfs.c b/drivers/rtc/sysfs.c index 86d1140b4f39..bf98a89d0e4e 100644 --- a/drivers/rtc/sysfs.c +++ b/drivers/rtc/sysfs.c @@ -314,17 +314,21 @@ int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps) size_t old_cnt = 0, add_cnt = 0, new_cnt; const struct attribute_group **groups, **old; - if (!grps) + if (grps) { + for (groups = grps; *groups; groups++) + add_cnt++; + /* No need to modify current groups if nothing new is provided */ + if (add_cnt == 0) + return 0; + } else { return -EINVAL; + } groups = rtc->dev.groups; if (groups) for (; *groups; groups++) old_cnt++; - for (groups = grps; *groups; groups++) - add_cnt++; - new_cnt = old_cnt + add_cnt + 1; groups = devm_kcalloc(&rtc->dev, new_cnt, sizeof(*groups), GFP_KERNEL); if (!groups) |