From 41cad8284d5e6bf1d49d3c10a6b52ee1ae866a20 Mon Sep 17 00:00:00 2001 From: Andrew Jones Date: Thu, 27 Apr 2023 18:36:26 +0200 Subject: RISC-V: Align SBI probe implementation with spec sbi_probe_extension() is specified with "Returns 0 if the given SBI extension ID (EID) is not available, or 1 if it is available unless defined as any other non-zero value by the implementation." Additionally, sbiret.value is a long. Fix the implementation to ensure any nonzero long value is considered a success, rather than only positive int values. Fixes: b9dcd9e41587 ("RISC-V: Add basic support for SBI v0.2") Signed-off-by: Andrew Jones Reviewed-by: Conor Dooley Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230427163626.101042-1-ajones@ventanamicro.com Signed-off-by: Palmer Dabbelt --- drivers/cpuidle/cpuidle-riscv-sbi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/cpuidle') diff --git a/drivers/cpuidle/cpuidle-riscv-sbi.c b/drivers/cpuidle/cpuidle-riscv-sbi.c index f2ccda2c3871..e8094fc92491 100644 --- a/drivers/cpuidle/cpuidle-riscv-sbi.c +++ b/drivers/cpuidle/cpuidle-riscv-sbi.c @@ -613,7 +613,7 @@ static int __init sbi_cpuidle_init(void) * 2) SBI HSM extension is available */ if ((sbi_spec_version < sbi_mk_version(0, 3)) || - sbi_probe_extension(SBI_EXT_HSM) <= 0) { + !sbi_probe_extension(SBI_EXT_HSM)) { pr_info("HSM suspend not available\n"); return 0; } -- cgit v1.2.3-58-ga151