[PATCH] of: Fix cpu node iterator to not ignore disabled cpu nodes

From: Rob Herring
Date: Wed Oct 31 2018 - 10:42:31 EST

In most cases, nodes with 'status = "disabled";' are treated as if the
node is not present though it is a common bug to forget to check that.
However, cpu nodes are different in that "disabled" simply means offline
and the OS can bring the CPU core online. Commit f1f207e43b8a ("of: Add
cpu node iterator for_each_of_cpu_node()") followed the common behavior
of ignoring disabled cpu nodes. This breaks some powerpc systems (at
least NXP P50XX/e5500). Fix this by dropping the status check.

Fixes: 651d44f9679c ("of: use for_each_of_cpu_node iterator")
Fixes: f1f207e43b8a ("of: Add cpu node iterator for_each_of_cpu_node()")
Reported-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Christian Zigotzky <chzigotzky@xxxxxxxxxxx>
Cc: Frank Rowand <frowand.list@xxxxxxxxx>
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
drivers/of/base.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index cc62da278663..e47c5ce6cd58 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -776,8 +776,6 @@ struct device_node *of_get_next_cpu_node(struct device_node *prev)
if (!(of_node_name_eq(next, "cpu") ||
(next->type && !of_node_cmp(next->type, "cpu"))))
- if (!__of_device_is_available(next))
- continue;
if (of_node_get(next))