From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/of/base.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/kernel/drivers/of/base.c b/kernel/drivers/of/base.c
index bcc88cb..bcb37c3 100644
--- a/kernel/drivers/of/base.c
+++ b/kernel/drivers/of/base.c
@@ -628,6 +628,28 @@
EXPORT_SYMBOL(of_device_is_available);
/**
+ * __of_device_is_fail - check if a device has status "fail" or "fail-..."
+ *
+ * @device: Node to check status for, with locks already held
+ *
+ * Return: True if the status property is set to "fail" or "fail-..." (for any
+ * error code suffix), false otherwise
+ */
+static bool __of_device_is_fail(const struct device_node *device)
+{
+ const char *status;
+
+ if (!device)
+ return false;
+
+ status = __of_get_property(device, "status", NULL);
+ if (status == NULL)
+ return false;
+
+ return !strcmp(status, "fail") || !strncmp(status, "fail-", 5);
+}
+
+/**
* of_device_is_big_endian - check if a device has BE registers
*
* @device: Node to check for endianness
@@ -775,6 +797,9 @@
* of_get_next_cpu_node - Iterate on cpu nodes
* @prev: previous child of the /cpus node, or NULL to get first
*
+ * Unusable CPUs (those with the status property set to "fail" or "fail-...")
+ * will be skipped.
+ *
* Returns a cpu node pointer with refcount incremented, use of_node_put()
* on it when done. Returns NULL when prev is the last child. Decrements
* the refcount of prev.
@@ -796,6 +821,8 @@
of_node_put(node);
}
for (; next; next = next->sibling) {
+ if (__of_device_is_fail(next))
+ continue;
if (!(of_node_name_eq(next, "cpu") ||
__of_node_is_type(next, "cpu")))
continue;
--
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