diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 47816e68c9036e91c5a3fb4a8c33104819a1c84d..5c0f32c7fbf6b20c8e20fba1ec32f7e08af29909 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -797,26 +797,27 @@ static irqreturn_t sci_br_interrupt(int irq, void *ptr)
 
 static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
 {
-        unsigned short ssr_status, scr_status;
-        struct uart_port *port = ptr;
+	unsigned short ssr_status, scr_status;
+	struct uart_port *port = ptr;
+	irqreturn_t ret = IRQ_NONE;
 
         ssr_status = sci_in(port,SCxSR);
         scr_status = sci_in(port,SCSCR);
 
 	/* Tx Interrupt */
-        if ((ssr_status & 0x0020) && (scr_status & 0x0080))
-                sci_tx_interrupt(irq, ptr);
+	if ((ssr_status & 0x0020) && (scr_status & SCI_CTRL_FLAGS_TIE))
+		ret = sci_tx_interrupt(irq, ptr);
 	/* Rx Interrupt */
-        if ((ssr_status & 0x0002) && (scr_status & 0x0040))
-                sci_rx_interrupt(irq, ptr);
+	if ((ssr_status & 0x0002) && (scr_status & SCI_CTRL_FLAGS_RIE))
+		ret = sci_rx_interrupt(irq, ptr);
 	/* Error Interrupt */
-        if ((ssr_status & 0x0080) && (scr_status & 0x0400))
-                sci_er_interrupt(irq, ptr);
+	if ((ssr_status & 0x0080) && (scr_status & SCI_CTRL_FLAGS_REIE))
+		ret = sci_er_interrupt(irq, ptr);
 	/* Break Interrupt */
-        if ((ssr_status & 0x0010) && (scr_status & 0x0200))
-                sci_br_interrupt(irq, ptr);
+	if ((ssr_status & 0x0010) && (scr_status & SCI_CTRL_FLAGS_REIE))
+		ret = sci_br_interrupt(irq, ptr);
 
-	return IRQ_HANDLED;
+	return ret;
 }
 
 #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_HAVE_CLK)
diff --git a/drivers/serial/sh-sci.h b/drivers/serial/sh-sci.h
index c17e541a07c4b222cc50608b3fb8e61b17760cb7..6163a45f968f4b9aef1b79056f02e2329232e231 100644
--- a/drivers/serial/sh-sci.h
+++ b/drivers/serial/sh-sci.h
@@ -166,6 +166,7 @@
 #if defined(CONFIG_CPU_SUBTYPE_SH7750)  || \
     defined(CONFIG_CPU_SUBTYPE_SH7091)  || \
     defined(CONFIG_CPU_SUBTYPE_SH7750R) || \
+    defined(CONFIG_CPU_SUBTYPE_SH7722)  || \
     defined(CONFIG_CPU_SUBTYPE_SH7750S) || \
     defined(CONFIG_CPU_SUBTYPE_SH7751)  || \
     defined(CONFIG_CPU_SUBTYPE_SH7751R) || \