irqchip: crossbar: Dont use '0' to mark reserved interrupts
Today '0' is actually reserved, but may not be the same in the future.
So, use a flag to mark the GIC interrupts that are reserved.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Sricharan R <r.sricharan@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Link: https://lkml.kernel.org/r/1403766634-18543-2-git-send-email-r.sricharan@ti.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c
index 3d15d16..20105bc 100644
--- a/drivers/irqchip/irq-crossbar.c
+++ b/drivers/irqchip/irq-crossbar.c
@@ -17,6 +17,7 @@
#include <linux/irqchip/arm-gic.h>
#define IRQ_FREE -1
+#define IRQ_RESERVED -2
#define GIC_IRQ_START 32
/*
@@ -139,7 +140,7 @@
pr_err("Invalid reserved entry\n");
goto err3;
}
- cb->irq_map[entry] = 0;
+ cb->irq_map[entry] = IRQ_RESERVED;
}
}
@@ -170,7 +171,7 @@
* reserved irqs. so find and store the offsets once.
*/
for (i = 0; i < max; i++) {
- if (!cb->irq_map[i])
+ if (cb->irq_map[i] == IRQ_RESERVED)
continue;
cb->register_offsets[i] = reserved;