[PATCH] Serial: Add uart_insert_char()

Add uart_insert_char(), which handles inserting characters into the
flip buffer.  This helper function handles the correct semantics
for handling overrun in addition to inserting normal characters.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>

1 files changed, 2 insertions, 12 deletions

diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c
index 33fbda79f350..0b10169961eb 100644
--- a/drivers/serial/21285.c
+++ b/drivers/serial/21285.c
@@ -126,18 +126,8 @@ static irqreturn_t serial21285_rx_chars(int irq, void *dev_id, struct pt_regs *r
                                 flag = TTY_FRAME;
                 }
 
-                if ((rxs & port->ignore_status_mask) == 0) {
-                        tty_insert_flip_char(tty, ch, flag);
-                }
-                if ((rxs & RXSTAT_OVERRUN) &&
-                    tty->flip.count < TTY_FLIPBUF_SIZE) {
-                        /*
-                         * Overrun is special, since it's reported
-                         * immediately, and doesn't affect the current
-                         * character.
-                         */
-                        tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-                }
+                uart_insert_char(port, rxs, RXSTAT_OVERRUN, ch, flag);
+
                 status = *CSR_UARTFLG;
         }
         tty_flip_buffer_push(tty);