[PATCH] TTY layer buffering revamp

[pandora-kernel.git] / drivers / serial / sunsab.c

diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index 8d19888..7e773ff 100644 (file)
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -159,21 +159,14 @@ receive_chars(struct uart_sunsab_port *up,
                saw_console_brk = 1;
 
        for (i = 0; i < count; i++) {
-               unsigned char ch = buf[i];
+               unsigned char ch = buf[i], flag;
 
                if (tty == NULL) {
                        uart_handle_sysrq_char(&up->port, ch, regs);
                        continue;
                }
 
-               if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
-                       tty->flip.work.func((void *)tty);
-                       if (tty->flip.count >= TTY_FLIPBUF_SIZE)
-                               return tty; // if TTY_DONT_FLIP is set
-               }
-
-               *tty->flip.char_buf_ptr = ch;
-               *tty->flip.flag_buf_ptr = TTY_NORMAL;
+               flag = TTY_NORMAL;
                up->port.icount.rx++;
 
                if (unlikely(stat->sreg.isr0 & (SAB82532_ISR0_PERR |
@@ -209,34 +202,21 @@ receive_chars(struct uart_sunsab_port *up,
                        stat->sreg.isr1 &= ((up->port.read_status_mask >> 8) & 0xff);
 
                        if (stat->sreg.isr1 & SAB82532_ISR1_BRK) {
-                               *tty->flip.flag_buf_ptr = TTY_BREAK;
+                               flag = TTY_BREAK;
                        } else if (stat->sreg.isr0 & SAB82532_ISR0_PERR)
-                               *tty->flip.flag_buf_ptr = TTY_PARITY;
+                               flag = TTY_PARITY;
                        else if (stat->sreg.isr0 & SAB82532_ISR0_FERR)
-                               *tty->flip.flag_buf_ptr = TTY_FRAME;
+                               flag = TTY_FRAME;
                }
 
                if (uart_handle_sysrq_char(&up->port, ch, regs))
                        continue;
 
                if ((stat->sreg.isr0 & (up->port.ignore_status_mask & 0xff)) == 0 &&
-                   (stat->sreg.isr1 & ((up->port.ignore_status_mask >> 8) & 0xff)) == 0){
-                       tty->flip.flag_buf_ptr++;
-                       tty->flip.char_buf_ptr++;
-                       tty->flip.count++;
-               }
-               if ((stat->sreg.isr0 & SAB82532_ISR0_RFO) &&
-                   tty->flip.count < TTY_FLIPBUF_SIZE) {
-                       /*
-                        * Overrun is special, since it's reported
-                        * immediately, and doesn't affect the current
-                        * character.
-                        */
-                       *tty->flip.flag_buf_ptr = TTY_OVERRUN;
-                       tty->flip.flag_buf_ptr++;
-                       tty->flip.char_buf_ptr++;
-                       tty->flip.count++;
-               }
+                   (stat->sreg.isr1 & ((up->port.ignore_status_mask >> 8) & 0xff)) == 0)
+                       tty_insert_flip_char(tty, ch, flag);
+               if (stat->sreg.isr0 & SAB82532_ISR0_RFO)
+                       tty_insert_flip_char(tty, 0, TTY_OVERRUN);
        }
 
        if (saw_console_brk)
@@ -245,7 +225,7 @@ receive_chars(struct uart_sunsab_port *up,
        return tty;
 }
 
-static void sunsab_stop_tx(struct uart_port *, unsigned int);
+static void sunsab_stop_tx(struct uart_port *);
 static void sunsab_tx_idle(struct uart_sunsab_port *);
 
 static void transmit_chars(struct uart_sunsab_port *up,
@@ -274,7 +254,6 @@ static void transmit_chars(struct uart_sunsab_port *up,
        if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
                up->interrupt_mask1 |= SAB82532_IMR1_XPR;
                writeb(up->interrupt_mask1, &up->regs->w.imr1);
-               uart_write_wakeup(&up->port);
                return;
        }
 
@@ -301,7 +280,7 @@ static void transmit_chars(struct uart_sunsab_port *up,
                uart_write_wakeup(&up->port);
 
        if (uart_circ_empty(xmit))
-               sunsab_stop_tx(&up->port, 0);
+               sunsab_stop_tx(&up->port);
 }
 
 static void check_status(struct uart_sunsab_port *up,
@@ -448,7 +427,7 @@ static unsigned int sunsab_get_mctrl(struct uart_port *port)
 }
 
 /* port->lock held by caller.  */
-static void sunsab_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void sunsab_stop_tx(struct uart_port *port)
 {
        struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
 
@@ -476,7 +455,7 @@ static void sunsab_tx_idle(struct uart_sunsab_port *up)
 }
 
 /* port->lock held by caller.  */
-static void sunsab_start_tx(struct uart_port *port, unsigned int tty_start)
+static void sunsab_start_tx(struct uart_port *port)
 {
        struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
        struct circ_buf *xmit = &up->port.info->xmit;