tree b1a51ac4678d7e29ad5feb96b5bdc9e4f15f4f00
parent d2122061f0332f3746cecef0ffb4cf66cac88cfd
author Steven Rostedt (VMware) <rostedt@goodmis.org> 1624659457 -0400
committer Steven Rostedt (VMware) <rostedt@goodmis.org> 1624909655 -0400

libtracefs: Fix the errno values of tracefs_tracer_set()

Be consistent with the errno values on error for tracefs_tracer_set(). If
a bad enum is passed in, then EINVAL should be set, not ENODEV. But if the
tracer does not exist, then ENODEV should be set (even though the write
will return EINVAL).

Also fix the setting of errno to negative values. That's done in the
kernel, not user space.

Link: https://lore.kernel.org/linux-trace-devel/20210625221739.1215557-3-rostedt@goodmis.org

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>