Johan Hovold 0b2588cadf
TTY: fix close of uninitialised ports ...
Make sure we do not make tty-driver callbacks or wait for port to drain
on uninitialised ports (e.g. when open failed) in
tty_port_close_start().
No callback, such as flush_buffer or wait_until_sent, needs to be made
on a port that has never been opened. Neither does it make much sense to
add drain delay for an uninitialised port.
Currently a drain delay of up to two seconds could be added when a tty
fails to open.
Signed-off-by: Johan Hovold <jhovold@gmail.com >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
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Johan Hovold
0b2588cadf