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Subject[PATCH v2 1/3] tracing/user_events: Fix incorrect return value for writing operation when events are disabled
Date
The writing operation return the count of writes whether events are
enabled or disabled. This is incorrect when events are disabled. Fix
this by just return -ENOENT when events are 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..92204bbe79da 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 -ENOENT;

return ret;
}
--
2.25.1
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