diff options
| author | wangkeqi <wangkeqiwang@didiglobal.com> | 2023-12-23 09:50:32 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-01-02 17:13:48 +0300 |
| commit | c46bfba1337d301661dbb23cfd905d4cb51f27ca (patch) | |
| tree | d14cc7e2301503957e6361e6b0678393fb7af8d1 /drivers/connector | |
| parent | 059d37b718d38d26087121c754691df77acfc66b (diff) | |
| download | linux-c46bfba1337d301661dbb23cfd905d4cb51f27ca.tar.xz | |
connector: Fix proc_event_num_listeners count not cleared
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@didiglobal.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/connector')
| -rw-r--r-- | drivers/connector/cn_proc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c index 44b19e696176..3d5e6d705fc6 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); } |