summaryrefslogtreecommitdiff
path: root/drivers/connector
diff options
context:
space:
mode:
authorwangkeqi <wangkeqiwang@didiglobal.com>2023-12-23 09:50:32 +0300
committerDavid S. Miller <davem@davemloft.net>2024-01-02 17:13:48 +0300
commitc46bfba1337d301661dbb23cfd905d4cb51f27ca (patch)
treed14cc7e2301503957e6361e6b0678393fb7af8d1 /drivers/connector
parent059d37b718d38d26087121c754691df77acfc66b (diff)
downloadlinux-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.c5
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);
}