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authorXiubo Li <Li.Xiubo@freescale.com>2014-01-22 13:57:39 +0800
committerGrant Likely <grant.likely@linaro.org>2014-02-04 17:21:07 +0000
commit62664f67775fad840cf6f68d6b5f428817bef6c5 (patch)
treeb05d5f8fba0b95c6abc92a4c1389de725d483aa5 /drivers/of
parente3963fd60a83967573f6330c9db134bd581da746 (diff)
downloadlinux-62664f67775fad840cf6f68d6b5f428817bef6c5.tar.bz2
of: add __of_add_property() without lock operations
There two places will use the same code for adding one new property to the DT node. Adding __of_add_property() and prepare for fixing of_update_property()'s bug. Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c38
1 files changed, 24 insertions, 14 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 87038d80b473..6ad3dc976b18 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1493,11 +1493,31 @@ static int of_property_notify(int action, struct device_node *np,
#endif
/**
+ * __of_add_property - Add a property to a node without lock operations
+ */
+static int __of_add_property(struct device_node *np, struct property *prop)
+{
+ struct property **next;
+
+ prop->next = NULL;
+ next = &np->properties;
+ while (*next) {
+ if (strcmp(prop->name, (*next)->name) == 0)
+ /* duplicate ! don't insert it */
+ return -EEXIST;
+
+ next = &(*next)->next;
+ }
+ *next = prop;
+
+ return 0;
+}
+
+/**
* of_add_property - Add a property to a node
*/
int of_add_property(struct device_node *np, struct property *prop)
{
- struct property **next;
unsigned long flags;
int rc;
@@ -1505,27 +1525,17 @@ int of_add_property(struct device_node *np, struct property *prop)
if (rc)
return rc;
- prop->next = NULL;
raw_spin_lock_irqsave(&devtree_lock, flags);
- next = &np->properties;
- while (*next) {
- if (strcmp(prop->name, (*next)->name) == 0) {
- /* duplicate ! don't insert it */
- raw_spin_unlock_irqrestore(&devtree_lock, flags);
- return -1;
- }
- next = &(*next)->next;
- }
- *next = prop;
+ rc = __of_add_property(np, prop);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
#ifdef CONFIG_PROC_DEVICETREE
/* try to add to proc as well if it was initialized */
- if (np->pde)
+ if (!rc && np->pde)
proc_device_tree_add_prop(np->pde, prop);
#endif /* CONFIG_PROC_DEVICETREE */
- return 0;
+ return rc;
}
/**