diff options
Diffstat (limited to 'drivers/serial/sunhv.c')
| -rw-r--r-- | drivers/serial/sunhv.c | 55 |
1 files changed, 29 insertions, 26 deletions
diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c index 96557e6dba6..8ff900b0981 100644 --- a/drivers/serial/sunhv.c +++ b/drivers/serial/sunhv.c @@ -258,17 +258,7 @@ static void sunhv_stop_tx(struct uart_port *port) /* port->lock held by caller. */ static void sunhv_start_tx(struct uart_port *port) { - struct circ_buf *xmit = &port->info->xmit; - - while (!uart_circ_empty(xmit)) { - long status = sun4v_con_putchar(xmit->buf[xmit->tail]); - - if (status != HV_EOK) - break; - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } + transmit_chars(port); } /* port->lock is not held. */ @@ -440,8 +430,16 @@ static void sunhv_console_write_paged(struct console *con, const char *s, unsign { struct uart_port *port = sunhv_port; unsigned long flags; + int locked = 1; + + local_irq_save(flags); + if (port->sysrq) { + locked = 0; + } else if (oops_in_progress) { + locked = spin_trylock(&port->lock); + } else + spin_lock(&port->lock); - spin_lock_irqsave(&port->lock, flags); while (n > 0) { unsigned long ra = __pa(con_write_page); unsigned long page_bytes; @@ -469,7 +467,10 @@ static void sunhv_console_write_paged(struct console *con, const char *s, unsign ra += written; } } - spin_unlock_irqrestore(&port->lock, flags); + + if (locked) + spin_unlock(&port->lock); + local_irq_restore(flags); } static inline void sunhv_console_putchar(struct uart_port *port, char c) @@ -488,7 +489,15 @@ static void sunhv_console_write_bychar(struct console *con, const char *s, unsig { struct uart_port *port = sunhv_port; unsigned long flags; - int i; + int i, locked = 1; + + local_irq_save(flags); + if (port->sysrq) { + locked = 0; + } else if (oops_in_progress) { + locked = spin_trylock(&port->lock); + } else + spin_lock(&port->lock); spin_lock_irqsave(&port->lock, flags); for (i = 0; i < n; i++) { @@ -496,7 +505,10 @@ static void sunhv_console_write_bychar(struct console *con, const char *s, unsig sunhv_console_putchar(port, '\r'); sunhv_console_putchar(port, *s++); } - spin_unlock_irqrestore(&port->lock, flags); + + if (locked) + spin_unlock(&port->lock); + local_irq_restore(flags); } static struct console sunhv_console = { @@ -508,16 +520,6 @@ static struct console sunhv_console = { .data = &sunhv_reg, }; -static inline struct console *SUNHV_CONSOLE(void) -{ - if (con_is_present()) - return NULL; - - sunhv_console.index = 0; - - return &sunhv_console; -} - static int __devinit hv_probe(struct of_device *op, const struct of_device_id *match) { struct uart_port *port; @@ -570,7 +572,8 @@ static int __devinit hv_probe(struct of_device *op, const struct of_device_id *m sunhv_reg.tty_driver->name_base = sunhv_reg.minor - 64; sunserial_current_minor += 1; - sunhv_reg.cons = SUNHV_CONSOLE(); + sunserial_console_match(&sunhv_console, op->node, + &sunhv_reg, port->line); err = uart_add_one_port(&sunhv_reg, port); if (err) |