irq: simplify for_each_irq_desc() usage

Impact: cleanup

all for_each_irq_desc() usage point have !desc check.
then its check can move into for_each_irq_desc() macro.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 2 deletions

diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h
index c4a59c7a478b..5504a5c97836 100644
--- a/include/linux/irqnr.h
+++ b/include/linux/irqnr.h
@@ -22,10 +22,14 @@ extern struct irq_desc *irq_to_desc(unsigned int irq);
 
 # define for_each_irq_desc(irq, desc)                                   \
         for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs;           \
-             irq++, desc = irq_to_desc(irq))
+             irq++, desc = irq_to_desc(irq))                            \
+                if (desc)
+
+
 # define for_each_irq_desc_reverse(irq, desc)                           \
         for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0;      \
-             irq--, desc = irq_to_desc(irq))
+             irq--, desc = irq_to_desc(irq))                            \
+                if (desc)
 
 #endif /* CONFIG_GENERIC_HARDIRQS */