1 files changed, 3 insertions, 7 deletions

diff --git a/arch/mips/kernel/irq_txx9.c b/arch/mips/kernel/irq_txx9.c
index 172e14b461df..a4d1462c27f7 100644
--- a/arch/mips/kernel/irq_txx9.c
+++ b/arch/mips/kernel/irq_txx9.c
@@ -105,13 +105,9 @@ static void txx9_irq_mask_ack(unsigned int irq)
         unsigned int irq_nr = irq - TXX9_IRQ_BASE;
 
         txx9_irq_mask(irq);
-        if (TXx9_IRCR_EDGE(txx9irq[irq_nr].mode)) {
-                /* clear edge detection */
-                u32 cr = __raw_readl(&txx9_ircptr->cr[irq_nr / 8]);
-                cr = (cr >> ((irq_nr & (8 - 1)) * 2)) & 3;
-                __raw_writel(TXx9_IRSCR_EIClrE | irq_nr,
-                             &txx9_ircptr->scr);
-        }
+        /* clear edge detection */
+        if (unlikely(TXx9_IRCR_EDGE(txx9irq[irq_nr].mode)))
+                __raw_writel(TXx9_IRSCR_EIClrE | irq_nr, &txx9_ircptr->scr);
 }
 
 static int txx9_irq_set_type(unsigned int irq, unsigned int flow_type)