diff options
Diffstat (limited to 'drivers/serial/mux.c')
| -rw-r--r-- | drivers/serial/mux.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c index 660bae5ba179..4e49168c3176 100644 --- a/drivers/serial/mux.c +++ b/drivers/serial/mux.c @@ -65,8 +65,8 @@ static struct uart_driver mux_driver = { static struct timer_list mux_timer; -#define UART_PUT_CHAR(p, c) __raw_writel((c), (unsigned long)(p)->membase + IO_DATA_REG_OFFSET) -#define UART_GET_FIFO_CNT(p) __raw_readl((unsigned long)(p)->membase + IO_DCOUNT_REG_OFFSET) +#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET) +#define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET) #define GET_MUX_PORTS(iodc_data) ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8 /** @@ -79,10 +79,7 @@ static struct timer_list mux_timer; */ static unsigned int mux_tx_empty(struct uart_port *port) { - unsigned int cnt = __raw_readl((unsigned long)port->membase - + IO_DCOUNT_REG_OFFSET); - - return cnt ? 0 : TIOCSER_TEMT; + return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT; } /** @@ -218,8 +215,7 @@ static void mux_read(struct uart_port *port) __u32 start_count = port->icount.rx; while(1) { - data = __raw_readl((unsigned long)port->membase - + IO_DATA_REG_OFFSET); + data = __raw_readl(port->membase + IO_DATA_REG_OFFSET); if (MUX_STATUS(data)) continue; @@ -227,11 +223,6 @@ static void mux_read(struct uart_port *port) if (MUX_EOFIFO(data)) break; - if (tty->flip.count >= TTY_FLIPBUF_SIZE) - continue; - - *tty->flip.char_buf_ptr = data & 0xffu; - *tty->flip.flag_buf_ptr = TTY_NORMAL; port->icount.rx++; if (MUX_BREAK(data)) { @@ -243,9 +234,7 @@ static void mux_read(struct uart_port *port) if (uart_handle_sysrq_char(port, data & 0xffu, NULL)) continue; - tty->flip.flag_buf_ptr++; - tty->flip.char_buf_ptr++; - tty->flip.count++; + tty_insert_flip_char(tty, data & 0xFF, TTY_NORMAL); } if (start_count != port->icount.rx) { @@ -481,6 +470,13 @@ static int __init mux_probe(struct parisc_device *dev) port->ops = &mux_pops; port->flags = UPF_BOOT_AUTOCONF; port->line = port_cnt; + + /* The port->timeout needs to match what is present in + * uart_wait_until_sent in serial_core.c. Otherwise + * the time spent in msleep_interruptable will be very + * long, causing the appearance of a console hang. + */ + port->timeout = HZ / 50; spin_lock_init(&port->lock); status = uart_add_one_port(&mux_driver, port); BUG_ON(status); |