From: Anup Patel <apatel@ventanamicro.com> stable inclusion from stable-v6.6.2 commit 625046cd1d5fc4c21abf6ede0d30205ecff25d1d category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8IW7G Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit c4676f8dc1e12e68d6511f9ed89707fdad4c962c ] The riscv_of_processor_hartid() used by riscv_of_parent_hartid() fails for HARTs disabled in the DT. This results in the following warning thrown by the RISC-V INTC driver for the E-core on SiFive boards: [ 0.000000] riscv-intc: unable to find hart id for /cpus/cpu@0/interrupt-controller The riscv_of_parent_hartid() is only expected to read the hartid from the DT so we directly call of_get_cpu_hwid() instead of calling riscv_of_processor_hartid(). Fixes: ad635e723e17 ("riscv: cpu: Add 64bit hartid support on RV64") Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com> Link: https://lore.kernel.org/r/20231027154254.355853-2-apatel@ventanamicro.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- arch/riscv/kernel/cpu.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c index c17dacb1141c..157ace8b262c 100644 --- a/arch/riscv/kernel/cpu.c +++ b/arch/riscv/kernel/cpu.c @@ -125,13 +125,14 @@ int __init riscv_early_of_processor_hartid(struct device_node *node, unsigned lo */ int riscv_of_parent_hartid(struct device_node *node, unsigned long *hartid) { - int rc; - for (; node; node = node->parent) { if (of_device_is_compatible(node, "riscv")) { - rc = riscv_of_processor_hartid(node, hartid); - if (!rc) - return 0; + *hartid = (unsigned long)of_get_cpu_hwid(node, 0); + if (*hartid == ~0UL) { + pr_warn("Found CPU without hart ID\n"); + return -ENODEV; + } + return 0; } } -- 2.25.1