tree 18b67fe756d1aa42028ce90e05277fc6f7904ebc
parent ac8305cd16ea2c35084ceb5cdf36f5a90c275c3a
author Geert Uytterhoeven <geert+renesas@glider.be> 1466780353 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1466870993 -0700

serial: sh-sci: Do not start transfers from sci_startup()

FIFO reset is done in sci_reset(), called from sci_set_termios(), while
sci_start_tx() and sci_start_rx() are called before, from sci_startup().
However, starting transfers before the UART's FIFOs have been reset may
cause reading of stale data.

Remove the calls to sci_start_tx() and sci_start_rx() from sci_startup()
to fix this.

Transfers are still started when needed:
  - sci_start_rx() is called from sci_set_termios() after FIFO reset, if
    the CREAD flag is set,
  - sci_start_tx() is called from uart_change_speed() immediately
    thereafter, if transmission is enabled.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>