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connector/cn_proc: revert "connector: Fix proc_event_num_listeners count not cleared" 

This reverts commit c46bfba133 ("connector: Fix proc_event_num_listeners
count not cleared").

It is not accurate to reset proc_event_num_listeners according to
cn_netlink_send_mult() return value -ESRCH.

In the case of stress-ng netlink-proc, -ESRCH will always be returned,
because netlink_broadcast_filtered will return -ESRCH,
which may cause stress-ng netlink-proc performance degradation.

Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202401112259.b23a1567-oliver.sang@intel.com
Fixes: c46bfba133 ("connector: Fix proc_event_num_listeners count not cleared")
Signed-off-by: Keqi Wang <wangkeqi_chris@163.com>
Link: https://lore.kernel.org/r/20240209091659.68723-1-wangkeqi_chris@163.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Keqi Wang 2024-02-09 17:16:59 +08:00 committed by Paolo Abeni
parent f1acf1ac84
commit 8929f95b2b
1 changed files with 2 additions and 3 deletions
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5
drivers/connector/cn_proc.c
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@ -108,9 +108,8 @@ static inline void send_msg(struct cn_msg *msg)
filter_data[1] = 0;
}
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);
cn_netlink_send_mult(msg, msg->len, 0, CN_IDX_PROC, GFP_NOWAIT,
cn_filter, (void *)filter_data);
local_unlock(&local_event.lock);
}