diff options
Diffstat (limited to 'drivers/tty/serial/lantiq.c')
| -rw-r--r-- | drivers/tty/serial/lantiq.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c index 02da071fe1e..88d01e0bb0c 100644 --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -162,21 +162,16 @@ lqasc_enable_ms(struct uart_port *port) static int lqasc_rx_chars(struct uart_port *port) { - struct tty_struct *tty = tty_port_tty_get(&port->state->port); + struct tty_port *tport = &port->state->port; unsigned int ch = 0, rsr = 0, fifocnt; - if (!tty) { - dev_dbg(port->dev, "%s:tty is busy now", __func__); - return -EBUSY; - } - fifocnt = - ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_RXFFLMASK; + fifocnt = ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_RXFFLMASK; while (fifocnt--) { u8 flag = TTY_NORMAL; ch = ltq_r8(port->membase + LTQ_ASC_RBUF); rsr = (ltq_r32(port->membase + LTQ_ASC_STATE) & ASCSTATE_ANY) | UART_DUMMY_UER_RX; - tty_flip_buffer_push(tty); + tty_flip_buffer_push(tport); port->icount.rx++; /* @@ -208,7 +203,7 @@ lqasc_rx_chars(struct uart_port *port) } if ((rsr & port->ignore_status_mask) == 0) - tty_insert_flip_char(tty, ch, flag); + tty_insert_flip_char(tport, ch, flag); if (rsr & ASCSTATE_ROE) /* @@ -216,11 +211,12 @@ lqasc_rx_chars(struct uart_port *port) * immediately, and doesn't affect the current * character */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); + tty_insert_flip_char(tport, 0, TTY_OVERRUN); } + if (ch != 0) - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty_flip_buffer_push(tport); + return 0; } @@ -322,7 +318,7 @@ lqasc_startup(struct uart_port *port) struct ltq_uart_port *ltq_port = to_ltq_uart_port(port); int retval; - if (ltq_port->clk) + if (!IS_ERR(ltq_port->clk)) clk_enable(ltq_port->clk); port->uartclk = clk_get_rate(ltq_port->fpiclk); @@ -390,7 +386,7 @@ lqasc_shutdown(struct uart_port *port) port->membase + LTQ_ASC_RXFCON); ltq_w32_mask(ASCTXFCON_TXFEN, ASCTXFCON_TXFFLU, port->membase + LTQ_ASC_TXFCON); - if (ltq_port->clk) + if (!IS_ERR(ltq_port->clk)) clk_disable(ltq_port->clk); } @@ -640,6 +636,9 @@ lqasc_console_setup(struct console *co, char *options) port = <q_port->port; + if (!IS_ERR(ltq_port->clk)) + clk_enable(ltq_port->clk); + port->uartclk = clk_get_rate(ltq_port->fpiclk); if (options) |