Commit f6d026ee authored by sunliming's avatar sunliming Committed by Steven Rostedt (Google)
Browse files

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.

Link: https://lkml.kernel.org/r/20230626111344.19136-2-sunliming@kylinos.cn



Cc: stable@vger.kernel.org
7f5a08c7 ("user_events: Add minimal support for trace_event into ftrace")
Acked-by: default avatarBeau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: default avatarsunliming <sunliming@kylinos.cn>
Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
parent 0113d461

kernel/trace/trace_events_user.c

+2 −1
Original line number Diff line number Diff line
@@ -2096,7 +2096,8 @@ static ssize_t user_events_write_core(struct file *file, struct iov_iter *i) 


		if (unlikely(faulted))

			return -EFAULT;

	}

	} else

		return -EBADF;



	return ret;

}