ARM: OMAP: Fix for mailbox-omap1

Fix for omap1 mailbox driver.
This will enable DSP Gateway again.
Signed-off-by: Toshihiro Kobayashi <toshihiro.kobayashi@nokia.com>

arch/arm/mach-omap1/mailbox.c

@@ -67,7 +67,7 @@ static inline void
 omap1_mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
 {
 	struct omap_mbox1_fifo *fifo =
-		&((struct omap_mbox1_priv *)mbox->priv)->rx_fifo;
+		&((struct omap_mbox1_priv *)mbox->priv)->tx_fifo;
 
 	mbox_write_reg(msg & 0xffff, fifo->data);
 	mbox_write_reg(msg >> 16, fifo->cmd);
@@ -110,6 +110,7 @@ omap1_mbox_is_irq(struct omap_mbox *mbox, omap_mbox_type_t irq)
 }
 
 struct omap_mbox_ops omap1_mbox_ops = {
+	.type = OMAP_MBOX_TYPE1,
 	.fifo_read = omap1_mbox_fifo_read,
 	.fifo_write = omap1_mbox_fifo_write,
 	.fifo_empty = omap1_mbox_fifo_empty,

arch/arm/plat-omap/mailbox.c

@@ -114,10 +114,13 @@ static void mbox_msg_receiver(void *p)
 	struct omap_mbox *mbox = (struct omap_mbox *)p;
 	struct omap_mbq *mbq = mbox->mbq;
 	mbox_msg_t msg;
+	int was_full;
 
 	while (!mbq_empty(mbq)) {
+		was_full = mbq_full(mbq);
 		msg = mbq_get(mbq);
-		enable_mbox_irq(mbox, IRQ_RX);
+		if (was_full)	/* now we have a room in the mbq. */
+			enable_mbox_irq(mbox, IRQ_RX);
 
 		if (unlikely(mbox_seq_test(mbox, msg))) {
 			printk(KERN_ERR