[MIPS] VR41xx: unsigned irq cannot be negative

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/mips/vr41xx/common/irq.c b/arch/mips/vr41xx/common/irq.c
index cba36a247e32..92dd1a0ca352 100644
--- a/arch/mips/vr41xx/common/irq.c
+++ b/arch/mips/vr41xx/common/irq.c
@@ -72,6 +72,7 @@ static void irq_dispatch(unsigned int irq)
         cascade = irq_cascade + irq;
         if (cascade->get_irq != NULL) {
                 unsigned int source_irq = irq;
+                int ret;
                 desc = irq_desc + source_irq;
                 if (desc->chip->mask_ack)
                         desc->chip->mask_ack(source_irq);
@@ -79,8 +80,9 @@ static void irq_dispatch(unsigned int irq)
                         desc->chip->mask(source_irq);
                         desc->chip->ack(source_irq);
                 }
-                irq = cascade->get_irq(irq);
-                if (irq < 0)
+                ret = cascade->get_irq(irq);
+                irq = ret;
+                if (ret < 0)
                         atomic_inc(&irq_err_count);
                 else
                         irq_dispatch(irq);