x86: Do sanity test on pirq table before writing
If pirq_routing_table points to NULL, that means U-Boot fails to
generate the table before in create_pirq_routing_table(), so we
test it against NULL before actually writing it.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/irq.c b/arch/x86/cpu/irq.c
index d1711af..74b89ad 100644
--- a/arch/x86/cpu/irq.c
+++ b/arch/x86/cpu/irq.c
@@ -209,5 +209,8 @@
u32 write_pirq_routing_table(u32 addr)
{
+ if (!pirq_routing_table)
+ return addr;
+
return copy_pirq_routing_table(addr, pirq_routing_table);
}