x86: prevent C-states hang on AMD C1E enabled machines

[profile/ivi/kernel-x86-ivi.git] / include / asm-x86 / acpi.h

diff --git a/include/asm-x86/acpi.h b/include/asm-x86/acpi.h
index 635d764..35d1743 100644 (file)
--- a/include/asm-x86/acpi.h
+++ b/include/asm-x86/acpi.h
@@ -140,6 +140,8 @@ static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
            boot_cpu_data.x86_model <= 0x05 &&
            boot_cpu_data.x86_mask < 0x0A)
                return 1;
+       else if (boot_cpu_has(X86_FEATURE_AMDC1E))
+               return 1;
        else
                return max_cstate;
 }