diff options
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/pm-cps.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/kernel/pm-cps.c b/arch/mips/kernel/pm-cps.c index c4c2069d3a2..c409a5aef8a 100644 --- a/arch/mips/kernel/pm-cps.c +++ b/arch/mips/kernel/pm-cps.c @@ -149,6 +149,10 @@ int cps_pm_enter_state(enum cps_pm_state state) /* Setup the VPE to run mips_cps_pm_restore when started again */ if (config_enabled(CONFIG_CPU_PM) && state == CPS_PM_POWER_GATED) { + /* Power gating relies upon CPS SMP */ + if (!mips_cps_smp_in_use()) + return -EINVAL; + core_cfg = &mips_cps_core_bootcfg[core]; vpe_cfg = &core_cfg->vpe_config[current_cpu_data.vpe_id]; vpe_cfg->pc = (unsigned long)mips_cps_pm_restore; @@ -376,6 +380,10 @@ static void * __init cps_gen_entry_code(unsigned cpu, enum cps_pm_state state) memset(relocs, 0, sizeof(relocs)); if (config_enabled(CONFIG_CPU_PM) && state == CPS_PM_POWER_GATED) { + /* Power gating relies upon CPS SMP */ + if (!mips_cps_smp_in_use()) + goto out_err; + /* * Save CPU state. Note the non-standard calling convention * with the return address placed in v0 to avoid clobbering |