MN10300: ASB2364: Handle the IRQ multiplexer in the FPGA

Handle the IRQ multiplexer in the FPGA by implementing a cascade interrupt
driver for it.

Signed-off-by: David Howells <dhowells@redhat.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/arch/mn10300/kernel/irq.c b/arch/mn10300/kernel/irq.c
index 2f66a45dcd18..c2e44597c22b 100644
--- a/arch/mn10300/kernel/irq.c
+++ b/arch/mn10300/kernel/irq.c
@@ -381,9 +381,16 @@ int show_interrupts(struct seq_file *p, void *v)
                         seq_printf(p, "%3d: ", i);
                         for_each_present_cpu(cpu)
                                 seq_printf(p, "%10u ", kstat_irqs_cpu(i, cpu));
-                        seq_printf(p, " %14s.%u", irq_desc[i].chip->name,
-                                   (GxICR(i) & GxICR_LEVEL) >>
-                                   GxICR_LEVEL_SHIFT);
+
+                        if (i < NR_CPU_IRQS)
+                                seq_printf(p, " %14s.%u",
+                                           irq_desc[i].chip->name,
+                                           (GxICR(i) & GxICR_LEVEL) >>
+                                           GxICR_LEVEL_SHIFT);
+                        else
+                                seq_printf(p, " %14s",
+                                           irq_desc[i].chip->name);
+
                         seq_printf(p, "  %s", action->name);
 
                         for (action = action->next;