From: Mayuresh Chitale Date: Fri, 14 Nov 2025 06:58:06 +0000 (+0000) Subject: riscv: sbi: Prefer SRST shutdown over legacy X-Git-Tag: v6.18-rc7~9^2~1 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7b090e7b910cafd245f23e56f3257a151ca0a289;p=thirdparty%2Flinux.git riscv: sbi: Prefer SRST shutdown over legacy Currently, the sbi_init() always attempts to register the legacy shutdown function as the sys-off handler which is fine when RISCV_SBI_V01 is not enabled. However, if RISCV_SBI_V01 is enabled in the kernel and the SBI v0.1 is not supported by the underlying SBI implementation then the legacy shutdown fails. Fix this by not registering the legacy shutdown when SRST shutdown is available. Fixes: 70ddf86d76c1 ("riscv: sbi: Switch to new sys-off handler API") Signed-off-by: Mayuresh Chitale Reviewed-by: Anup Patel Link: https://patch.msgid.link/20251114065808.304430-1-mchitale@ventanamicro.com Signed-off-by: Paul Walmsley --- diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c index 5e8cde055264..c443337056ab 100644 --- a/arch/riscv/kernel/sbi.c +++ b/arch/riscv/kernel/sbi.c @@ -648,9 +648,9 @@ int sbi_debug_console_read(char *bytes, unsigned int num_bytes) void __init sbi_init(void) { + bool srst_power_off = false; int ret; - sbi_set_power_off(); ret = sbi_get_spec_version(); if (ret > 0) sbi_spec_version = ret; @@ -683,6 +683,7 @@ void __init sbi_init(void) sbi_probe_extension(SBI_EXT_SRST)) { pr_info("SBI SRST extension detected\n"); register_platform_power_off(sbi_srst_power_off); + srst_power_off = true; sbi_srst_reboot_nb.notifier_call = sbi_srst_reboot; sbi_srst_reboot_nb.priority = 192; register_restart_handler(&sbi_srst_reboot_nb); @@ -702,4 +703,7 @@ void __init sbi_init(void) __sbi_send_ipi = __sbi_send_ipi_v01; __sbi_rfence = __sbi_rfence_v01; } + + if (!srst_power_off) + sbi_set_power_off(); }