staging: dgap: use schedule_timeout_interruptible() instead of dgap_ms_sleep()
Using schedule_timeout_interruptible() is exactly same as setting a status of current process and calling schedule_timeout(). Removes dgap_ms_sleep(), because this function is used only when closing tty channel on dgap_tty_close(). And also removes ch_close_delay that is always set to 250 on dgap_tty_init(). Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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