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powerpc/powernv: set power_save func after the idle states are initialized

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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>
This commit is contained in:
Shreyas B. Prabhu 2016-06-08 11:54:27 -05:00 committed by Michael Ellerman
parent 9497a1c1c5
commit 5593e30327
2 changed files with 4 additions and 1 deletions
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3
arch/powerpc/platforms/powernv/idle.c
View File

@ -285,6 +285,9 @@ static int __init pnv_init_idle_states(void)
}
pnv_alloc_idle_core_states();
if (supported_cpuidle_states & OPAL_PM_NAP_ENABLED)
ppc_md.power_save = power7_idle;
out_free:
kfree(flags);
out:

2
arch/powerpc/platforms/powernv/setup.c
View File

@ -315,7 +315,7 @@ define_machine(powernv) {
.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,