Jiri Slaby 155591d3ce USB: serial: make usb_serial_driver::chars_in_buffer return uint ...

tty_operations::chars_in_buffer is being switched to return uint. Do the
same for usb_serial_driver's chars_in_buffer.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
[ johan: amend commit message ]
Signed-off-by: Johan Hovold <johan@kernel.org>

2021-05-19 10:56:41 +02:00

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