diff options
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/thermal_netlink.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c index aca36c4ddbf3..332052e24a86 100644 --- a/drivers/thermal/thermal_netlink.c +++ b/drivers/thermal/thermal_netlink.c @@ -76,6 +76,11 @@ typedef int (*cb_t)(struct param *); static struct genl_family thermal_gnl_family; +static int thermal_group_has_listeners(enum thermal_genl_multicast_groups group) +{ + return genl_has_listeners(&thermal_gnl_family, &init_net, group); +} + /************************** Sampling encoding *******************************/ int thermal_genl_sampling_temp(int id, int temp) @@ -83,6 +88,9 @@ int thermal_genl_sampling_temp(int id, int temp) struct sk_buff *skb; void *hdr; + if (!thermal_group_has_listeners(THERMAL_GENL_SAMPLING_GROUP)) + return 0; + skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!skb) return -ENOMEM; @@ -280,6 +288,9 @@ static int thermal_genl_send_event(enum thermal_genl_event event, int ret = -EMSGSIZE; void *hdr; + if (!thermal_group_has_listeners(THERMAL_GENL_EVENT_GROUP)) + return 0; + msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!msg) return -ENOMEM; |