From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Date: Wed, 8 Apr 2015 16:59:20 +0000 (+0300)
Subject: of: return NUMA_NO_NODE from fallback of_node_to_nid()
X-Git-Tag: v4.1.4~34
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=34f94b18c76f5912815cb1612f40deb7fcb4d0f6;p=platform%2Fkernel%2Flinux-exynos.git

of: return NUMA_NO_NODE from fallback of_node_to_nid()

commit c8fff7bc5bba6bd59cad40441c189c4efe7190f6 upstream.

Node 0 might be offline as well as any other numa node,
in this case kernel cannot handle memory allocation and crashes.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 0c3f061c195c ("of: implement of_node_to_nid as a weak function")
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/of/base.c b/drivers/of/base.c
index f065026..5ed9724 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -89,7 +89,7 @@ EXPORT_SYMBOL(of_n_size_cells);
 #ifdef CONFIG_NUMA
 int __weak of_node_to_nid(struct device_node *np)
 {
-	return numa_node_id();
+	return NUMA_NO_NODE;
 }
 #endif
 
diff --git a/include/linux/of.h b/include/linux/of.h
index b871ff9..8135d50 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -673,7 +673,10 @@ static inline void of_property_clear_flag(struct property *p, unsigned long flag
 #if defined(CONFIG_OF) && defined(CONFIG_NUMA)
 extern int of_node_to_nid(struct device_node *np);
 #else
-static inline int of_node_to_nid(struct device_node *device) { return 0; }
+static inline int of_node_to_nid(struct device_node *device)
+{
+	return NUMA_NO_NODE;
+}
 #endif
 
 static inline struct device_node *of_find_matching_node(