[PATCH v3 2/5] OMAP: mailbox: fix rx interrupt disable in omap4

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disabling rx interrupt on omap4 is different than its pre-decessors.
The bit in OMAP4_MAILBOX_IRQENABLE_CLR should be set to disable the
interrupts instead of clearing the bit.

Signed-off-by: Hari Kanigeri <h-kanigeri2@xxxxxx>
---
 arch/arm/mach-omap2/mailbox.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap2/mailbox.c b/arch/arm/mach-omap2/mailbox.c
index 42dbfa4..82b5ced 100644
--- a/arch/arm/mach-omap2/mailbox.c
+++ b/arch/arm/mach-omap2/mailbox.c
@@ -195,7 +195,10 @@ static void omap2_mbox_disable_irq(struct omap_mbox *mbox,
 	struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)mbox->priv;
 	u32 l, bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
 	l = mbox_read_reg(p->irqdisable);
-	l &= ~bit;
+	if (cpu_is_omap44xx())
+		l |= bit;
+	else
+		l &= ~bit;
 	mbox_write_reg(l, p->irqdisable);
 }
 
-- 
1.7.0

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