pnv_init_idle_states() discovers supported idle states from the
device tree and does the required initialization. Set power_save
function pointer only after this initialization is done
Otherwise on machines which don't support nap, eg. Power9, the kernel
will crash when it tries to nap.
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
}
pnv_alloc_idle_core_states();
+
+ if (supported_cpuidle_states & OPAL_PM_NAP_ENABLED)
+ ppc_md.power_save = power7_idle;
out_free:
kfree(flags);
out:
.get_proc_freq = pnv_get_proc_freq,
.progress = pnv_progress,
.machine_shutdown = pnv_shutdown,
- .power_save = power7_idle,
+ .power_save = NULL,
.calibrate_decr = generic_calibrate_decr,
#ifdef CONFIG_KEXEC
.kexec_cpu_down = pnv_kexec_cpu_down,