[PATCH 4.14 053/251] powerpc/85xx: Fix oops when mpc85xx_smp_guts_ids node cannot be found

[Greg Kroah-Hartman]

From: Xiaoming Ni <nixiaoming@xxxxxxxxxx>

commit 3c2172c1c47b4079c29f0e6637d764a99355ebcd upstream.

When the field described in mpc85xx_smp_guts_ids[] is not configured in
dtb, the mpc85xx_setup_pmc() does not assign a value to the "guts"
variable. As a result, the oops is triggered when
mpc85xx_freeze_time_base() is executed.

Fixes: 56f1ba280719 ("powerpc/mpc85xx: refactor the PM operations")
Cc: stable@xxxxxxxxxxxxxxx # v4.6+
Signed-off-by: Xiaoming Ni <nixiaoming@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210929033646.39630-2-nixiaoming@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_pm_ops.c
@@ -98,9 +98,8 @@ int __init mpc85xx_setup_pmc(void)
 			pr_err("Could not map guts node address\n");
 			return -ENOMEM;
 		}
+		qoriq_pm_ops = &mpc85xx_pm_ops;
 	}
 
-	qoriq_pm_ops = &mpc85xx_pm_ops;
-
 	return 0;
 }