From 86fe639a1c1678d81fc4c82a39a5299df6deb944 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 30 Oct 2019 16:11:47 -0700 Subject: [PATCH] riscv: enter WFI in default_power_off() if SBI does not shutdown Provide a new default fallback power off that just sits in a wfi loop to save some power. Signed-off-by: Christoph Hellwig Reviewed-by: Anup Patel Reviewed-by: Atish Patra [paul.walmsley@sifive.com: split the WFI fix apart from the nommu-related default_power_off() changes] Signed-off-by: Paul Walmsley --- arch/riscv/kernel/reset.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/riscv/kernel/reset.c b/arch/riscv/kernel/reset.c index aa56bb135ec49..485be426d9b1f 100644 --- a/arch/riscv/kernel/reset.c +++ b/arch/riscv/kernel/reset.c @@ -10,7 +10,8 @@ static void default_power_off(void) { sbi_shutdown(); - while (1); + while (1) + wait_for_interrupt(); } void (*pm_power_off)(void) = default_power_off; -- 2.30.2