serial: sh-sci: Tidy up fifo overrun error handling.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 29 insertions, 27 deletions

diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 0251077693d..b0feea49398 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -625,6 +625,27 @@ static inline int sci_handle_errors(struct uart_port *port)
         return copied;
 }
 
+static inline int sci_handle_fifo_overrun(struct uart_port *port)
+{
+        struct tty_struct *tty = port->info->port.tty;
+        int copied = 0;
+
+        if (port->type != PORT_SCIF)
+                return 0;
+
+        if ((sci_in(port, SCLSR) & SCIF_ORER) != 0) {
+                sci_out(port, SCLSR, 0);
+
+                tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+                tty_flip_buffer_push(tty);
+
+                dev_notice(port->dev, "overrun error\n");
+                copied++;
+        }
+
+        return copied;
+}
+
 static inline int sci_handle_breaks(struct uart_port *port)
 {
         int copied = 0;
@@ -647,20 +668,11 @@ static inline int sci_handle_breaks(struct uart_port *port)
                 dev_dbg(port->dev, "BREAK detected\n");
         }
 
-#if defined(SCIF_ORER)
-        /* XXX: Handle SCIF overrun error */
-        if (port->type != PORT_SCI && (sci_in(port, SCLSR) & SCIF_ORER) != 0) {
-                sci_out(port, SCLSR, 0);
-                if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) {
-                        copied++;
-                        dev_notice(port->dev, "overrun error\n");
-                }
-        }
-#endif
-
         if (copied)
                 tty_flip_buffer_push(tty);
 
+        copied += sci_handle_fifo_overrun(port);
+
         return copied;
 }
 
@@ -698,16 +710,7 @@ static irqreturn_t sci_er_interrupt(int irq, void *ptr)
                         sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
                 }
         } else {
-#if defined(SCIF_ORER)
-                if ((sci_in(port, SCLSR) & SCIF_ORER) != 0) {
-                        struct tty_struct *tty = port->info->port.tty;
-
-                        sci_out(port, SCLSR, 0);
-                        tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-                        tty_flip_buffer_push(tty);
-                        dev_notice(port->dev, "overrun error\n");
-                }
-#endif
+                sci_handle_fifo_overrun(port);
                 sci_rx_interrupt(irq, ptr);
         }
 
diff --git a/drivers/serial/sh-sci.h b/drivers/serial/sh-sci.h
index 6da755d6352..4479a91e247 100644
--- a/drivers/serial/sh-sci.h
+++ b/drivers/serial/sh-sci.h
@@ -232,6 +232,10 @@
 # define SCIF_TXROOM_MAX 16
 #endif
 
+#ifndef SCIF_ORER
+#define SCIF_ORER       0x0000
+#endif
+
 #define SCxSR_TEND(port)        (((port)->type == PORT_SCI) ? SCI_TEND   : SCIF_TEND)
 #define SCxSR_ERRORS(port)      (((port)->type == PORT_SCI) ? SCI_ERRORS : SCIF_ERRORS)
 #define SCxSR_RDxF(port)        (((port)->type == PORT_SCI) ? SCI_RDRF   : SCIF_RDF)
@@ -239,12 +243,7 @@
 #define SCxSR_FER(port)         (((port)->type == PORT_SCI) ? SCI_FER    : SCIF_FER)
 #define SCxSR_PER(port)         (((port)->type == PORT_SCI) ? SCI_PER    : SCIF_PER)
 #define SCxSR_BRK(port)         (((port)->type == PORT_SCI) ? 0x00       : SCIF_BRK)
-
-#if defined(CONFIG_CPU_SUBTYPE_SH7705)
-# define SCxSR_ORER(port)       (((port)->type == PORT_SCI) ? SCI_ORER : SCIF_ORER)
-#else
-# define SCxSR_ORER(port)       (((port)->type == PORT_SCI) ? SCI_ORER : 0x0000)
-#endif
+#define SCxSR_ORER(port)        (((port)->type == PORT_SCI) ? SCI_ORER   : SCIF_ORER)
 
 #if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
     defined(CONFIG_CPU_SUBTYPE_SH7720) || \