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commit641a41dbbaupstream. This patch fixes an issue that the sci_remove() could not remove dev_attr_rx_fifo_timeout because uart_remove_one_port() set the port->port.type to PORT_UNKNOWN. Reported-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com> Fixes:5d23188a47("serial: sh-sci: make RX FIFO parameters tunable via sysfs") Cc: <stable@vger.kernel.org> # v4.11+ Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>