diff options
Diffstat (limited to 'drivers/thermal/thermal_netlink.c')
| -rw-r--r-- | drivers/thermal/thermal_netlink.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c index 21f00d73acb7..332052e24a86 100644 --- a/drivers/thermal/thermal_netlink.c +++ b/drivers/thermal/thermal_netlink.c @@ -13,9 +13,14 @@ #include "thermal_core.h" +enum thermal_genl_multicast_groups { + THERMAL_GENL_SAMPLING_GROUP = 0, + THERMAL_GENL_EVENT_GROUP = 1, +}; + static const struct genl_multicast_group thermal_genl_mcgrps[] = { - { .name = THERMAL_GENL_SAMPLING_GROUP_NAME, }, - { .name = THERMAL_GENL_EVENT_GROUP_NAME, }, + [THERMAL_GENL_SAMPLING_GROUP] = { .name = THERMAL_GENL_SAMPLING_GROUP_NAME, }, + [THERMAL_GENL_EVENT_GROUP] = { .name = THERMAL_GENL_EVENT_GROUP_NAME, }, }; static const struct nla_policy thermal_genl_policy[THERMAL_GENL_ATTR_MAX + 1] = { @@ -71,6 +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) @@ -78,6 +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; @@ -95,7 +108,7 @@ int thermal_genl_sampling_temp(int id, int temp) genlmsg_end(skb, hdr); - genlmsg_multicast(&thermal_gnl_family, skb, 0, 0, GFP_KERNEL); + genlmsg_multicast(&thermal_gnl_family, skb, 0, THERMAL_GENL_SAMPLING_GROUP, GFP_KERNEL); return 0; out_cancel: @@ -275,6 +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; @@ -290,7 +306,7 @@ static int thermal_genl_send_event(enum thermal_genl_event event, genlmsg_end(msg, hdr); - genlmsg_multicast(&thermal_gnl_family, msg, 0, 1, GFP_KERNEL); + genlmsg_multicast(&thermal_gnl_family, msg, 0, THERMAL_GENL_EVENT_GROUP, GFP_KERNEL); return 0; |