Commit 5b370659 authored Aug 18, 2025 by Anup Patel Committed by Paul Walmsley Sep 04, 2025

ACPI: RISC-V: Fix FFH_CPPC_CSR error handling



The cppc_ffh_csr_read() and cppc_ffh_csr_write() returns Linux error
code in "data->ret.error" so cpc_read_ffh() and cpc_write_ffh() must
not use sbi_err_map_linux_errno() for FFH_CPPC_CSR.

Fixes: 30f3ffbe ("ACPI: RISC-V: Add CPPC driver")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Troy Mitchell <troy.mitchell@linux.dev>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Nutty Liu <nutty.liu@hotmail.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250818143600.894385-2-apatel@ventanamicro.com


Signed-off-by: Paul Walmsley <pjw@kernel.org>

parent 41f9049c

drivers/acpi/riscv/cppc.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -119,7 +119,7 @@ int cpc_read_ffh(int cpu, struct cpc_reg reg, u64 val)

		*val = data.ret.value;

		return (data.ret.error) ? sbi_err_map_linux_errno(data.ret.error) : 0;
		return data.ret.error;
		}

		return -EINVAL;
		@@ -148,7 +148,7 @@ int cpc_write_ffh(int cpu, struct cpc_reg *reg, u64 val)

		smp_call_function_single(cpu, cppc_ffh_csr_write, &data, 1);

		return (data.ret.error) ? sbi_err_map_linux_errno(data.ret.error) : 0;
		return data.ret.error;
		}

		return -EINVAL;