diff --git a/arch/arm/mach-omap2/mailbox.c b/arch/arm/mach-omap2/mailbox.c
index 42dbfa4..40ddeca 100644
--- a/arch/arm/mach-omap2/mailbox.c
+++ b/arch/arm/mach-omap2/mailbox.c
@@ -181,7 +181,7 @@
 static void omap2_mbox_enable_irq(struct omap_mbox *mbox,
 		omap_mbox_type_t irq)
 {
-	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)mbox->priv;
+	struct omap_mbox2_priv *p = mbox->priv;
 	u32 l, bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
 
 	l = mbox_read_reg(p->irqenable);
@@ -192,7 +192,7 @@
 static void omap2_mbox_disable_irq(struct omap_mbox *mbox,
 		omap_mbox_type_t irq)
 {
-	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)mbox->priv;
+	struct omap_mbox2_priv *p = mbox->priv;
 	u32 l, bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
 	l = mbox_read_reg(p->irqdisable);
 	l &= ~bit;
@@ -202,7 +202,7 @@
 static void omap2_mbox_ack_irq(struct omap_mbox *mbox,
 		omap_mbox_type_t irq)
 {
-	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)mbox->priv;
+	struct omap_mbox2_priv *p = mbox->priv;
 	u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
 
 	mbox_write_reg(bit, p->irqstatus);
@@ -214,7 +214,7 @@
 static int omap2_mbox_is_irq(struct omap_mbox *mbox,
 		omap_mbox_type_t irq)
 {
-	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)mbox->priv;
+	struct omap_mbox2_priv *p = mbox->priv;
 	u32 bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
 	u32 enable = mbox_read_reg(p->irqenable);
 	u32 status = mbox_read_reg(p->irqstatus);