[U-Boot] [PATCH v2 4/4] 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 ---

Changes in v2: None

arch/x86/cpu/irq.c | 3 +++ 1 file changed, 3 insertions(+)

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 @@ void pirq_init(void)

u32 write_pirq_routing_table(u32 addr) { + if (!pirq_routing_table) + return addr; + return copy_pirq_routing_table(addr, pirq_routing_table); }