From: wangkeqi <wangkeqiwang@xxxxxxxxxxxxxx> [ Upstream commit c46bfba1337d301661dbb23cfd905d4cb51f27ca ] When we register a cn_proc listening event, the proc_event_num_listener variable will be incremented by one, but if PROC_CN_MCAST_IGNORE is not called, the count will not decrease. This will cause the proc_*_connector function to take the wrong path. It will reappear when the forkstat tool exits via ctrl + c. We solve this problem by determining whether there are still listeners to clear proc_event_num_listener. Signed-off-by: wangkeqi <wangkeqiwang@xxxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/connector/cn_proc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c index 44b19e6961763..3d5e6d705fc6e 100644 --- a/drivers/connector/cn_proc.c +++ b/drivers/connector/cn_proc.c @@ -108,8 +108,9 @@ static inline void send_msg(struct cn_msg *msg) filter_data[1] = 0; } - cn_netlink_send_mult(msg, msg->len, 0, CN_IDX_PROC, GFP_NOWAIT, - cn_filter, (void *)filter_data); + if (cn_netlink_send_mult(msg, msg->len, 0, CN_IDX_PROC, GFP_NOWAIT, + cn_filter, (void *)filter_data) == -ESRCH) + atomic_set(&proc_event_num_listeners, 0); local_unlock(&local_event.lock); } -- 2.43.0
