diff options
Diffstat (limited to 'drivers/tty/serial/8250.c')
| -rw-r--r-- | drivers/tty/serial/8250.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c index b40f7b90c81..7f50999eebc 100644 --- a/drivers/tty/serial/8250.c +++ b/drivers/tty/serial/8250.c @@ -81,7 +81,7 @@ static unsigned int skip_txen_test; /* force skip of txen test at init time */ #define DEBUG_INTR(fmt...) do { } while (0) #endif -#define PASS_LIMIT 256 +#define PASS_LIMIT 512 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) @@ -1107,7 +1107,7 @@ static void autoconfig_16550a(struct uart_8250_port *up) */ DEBUG_AUTOCONF("Xscale "); up->port.type = PORT_XSCALE; - up->capabilities |= UART_CAP_UUE; + up->capabilities |= UART_CAP_UUE | UART_CAP_RTOIE; return; } } else { @@ -1819,6 +1819,8 @@ static void serial8250_backup_timeout(unsigned long data) unsigned int iir, ier = 0, lsr; unsigned long flags; + spin_lock_irqsave(&up->port.lock, flags); + /* * Must disable interrupts or else we risk racing with the interrupt * based handler. @@ -1836,10 +1838,8 @@ static void serial8250_backup_timeout(unsigned long data) * the "Diva" UART used on the management processor on many HP * ia64 and parisc boxes. */ - spin_lock_irqsave(&up->port.lock, flags); lsr = serial_in(up, UART_LSR); up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; - spin_unlock_irqrestore(&up->port.lock, flags); if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) && (!uart_circ_empty(&up->port.state->xmit) || up->port.x_char) && (lsr & UART_LSR_THRE)) { @@ -1848,11 +1848,13 @@ static void serial8250_backup_timeout(unsigned long data) } if (!(iir & UART_IIR_NO_INT)) - serial8250_handle_port(up); + transmit_chars(up); if (is_real_interrupt(up->port.irq)) serial_out(up, UART_IER, ier); + spin_unlock_irqrestore(&up->port.lock, flags); + /* Standard timer interval plus 0.2s to keep the port running */ mod_timer(&up->timer, jiffies + uart_poll_timeout(&up->port) + HZ / 5); @@ -3318,6 +3320,7 @@ void serial8250_unregister_port(int line) uart->port.flags &= ~UPF_BOOT_AUTOCONF; uart->port.type = PORT_UNKNOWN; uart->port.dev = &serial8250_isa_devs->dev; + uart->capabilities = uart_config[uart->port.type].flags; uart_add_one_port(&serial8250_reg, &uart->port); } else { uart->port.dev = NULL; |