diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/qcom_geni_serial.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index e63a8fbe63bd..fdc75bb26c69 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -488,18 +488,16 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s, geni_status = readl(uport->membase + SE_GENI_STATUS); - /* Cancel the current write to log the fault */ if (!locked) { - geni_se_cancel_m_cmd(&port->se); - if (!qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS, - M_CMD_CANCEL_EN, true)) { - geni_se_abort_m_cmd(&port->se); - qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS, - M_CMD_ABORT_EN, true); - writel(M_CMD_ABORT_EN, uport->membase + - SE_GENI_M_IRQ_CLEAR); - } - writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); + /* + * We can only get here if an oops is in progress then we were + * unable to get the lock. This means we can't safely access + * our state variables like tx_remaining. About the best we + * can do is wait for the FIFO to be empty before we start our + * transfer, so we'll do that. + */ + qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS, + M_TX_FIFO_NOT_EMPTY_EN, false); } else if ((geni_status & M_GENI_CMD_ACTIVE) && !port->tx_remaining) { /* * It seems we can't interrupt existing transfers if all data @@ -516,11 +514,12 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s, __qcom_geni_serial_console_write(uport, s, count); - if (port->tx_remaining) - qcom_geni_serial_setup_tx(uport, port->tx_remaining); - if (locked) + if (locked) { + if (port->tx_remaining) + qcom_geni_serial_setup_tx(uport, port->tx_remaining); uart_port_unlock_irqrestore(uport, flags); + } } static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) |