Upon opening the tty, uart_open() ends up calling msm_set_baud_rate() which resets the uart block. If this happens as we're coming out of msm_console_write() a full fifo worth of console output will be discarded.
Cc: Stephen Boyd <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]> --- As reported here: https://bugs.96boards.org/show_bug.cgi?id=378 drivers/tty/serial/msm_serial.c | 18 ------------------ 1 file changed, 18 deletions(-) diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index b7d80bd57db9..93a10ac44933 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -813,23 +813,6 @@ static unsigned int msm_get_mctrl(struct uart_port *port) return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR | TIOCM_RTS; } -static void msm_reset(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - /* reset everything */ - msm_write(port, UART_CR_CMD_RESET_RX, UART_CR); - msm_write(port, UART_CR_CMD_RESET_TX, UART_CR); - msm_write(port, UART_CR_CMD_RESET_ERR, UART_CR); - msm_write(port, UART_CR_CMD_RESET_BREAK_INT, UART_CR); - msm_write(port, UART_CR_CMD_RESET_CTS, UART_CR); - msm_write(port, UART_CR_CMD_SET_RFR, UART_CR); - - /* Disable DM modes */ - if (msm_port->is_uartdm) - msm_write(port, 0, UARTDM_DMEN); -} - static void msm_set_mctrl(struct uart_port *port, unsigned int mctrl) { unsigned int mr; @@ -972,7 +955,6 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, msm_write(port, 10, UART_TFWR); msm_write(port, UART_CR_CMD_PROTECTION_EN, UART_CR); - msm_reset(port); /* Enable RX and TX */ msm_write(port, UART_CR_TX_ENABLE | UART_CR_RX_ENABLE, UART_CR); -- 2.5.0
