[PATCH v4 1/3] tracing/user_events: Fix incorrect return value for writing operation when events are disabled

The writing operation return the count of writes regardless of whether events are enabled or disabled. Switch it to return -EBADF to indicates that the event is disabled.

Signed-off-by: sunliming sunliming@kylinos.cn --- kernel/trace/trace_events_user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c index 1ac5ba5685ed..146bb2e9758f 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1957,7 +1957,8 @@ static ssize_t user_events_write_core(struct file *file, struct iov_iter *i)

if (unlikely(faulted)) return -EFAULT; - } + } else + return -EBADF;

return ret; }