nios2: fix error handling of irq_of_parse_and_map

Return value of irq_of_parse_and_map() is unsigned int, with 0
indicating failure, so testing for negative result never works.

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <lftan@altera.com>

diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c
index d90ca1b..23729e8 100644 (file)
--- a/arch/nios2/kernel/time.c
+++ b/arch/nios2/kernel/time.c
@@ -228,7 +228,7 @@ static __init void nios2_clockevent_init(struct device_node *timer)
        nios2_timer_get_base_and_freq(timer, &iobase, &freq);
 
        irq = irq_of_parse_and_map(timer, 0);
-       if (irq < 0)
+       if (!irq)
                panic("Unable to parse timer irq\n");
 
        nios2_ce.timer.base = iobase;