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path: root/drivers/of/base.c
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Diffstat (limited to 'drivers/of/base.c')
-rw-r--r--drivers/of/base.c100
1 files changed, 56 insertions, 44 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 16ee7a08e044..f86be5594a15 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -55,7 +55,7 @@ static DEFINE_MUTEX(of_aliases_mutex);
/* use when traversing tree through the allnext, child, sibling,
* or parent members of struct device_node.
*/
-DEFINE_RWLOCK(devtree_lock);
+DEFINE_RAW_SPINLOCK(devtree_lock);
int of_n_addr_cells(struct device_node *np)
{
@@ -188,10 +188,11 @@ struct property *of_find_property(const struct device_node *np,
int *lenp)
{
struct property *pp;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
pp = __of_find_property(np, name, lenp);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return pp;
}
@@ -209,13 +210,13 @@ struct device_node *of_find_all_nodes(struct device_node *prev)
{
struct device_node *np;
- read_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
np = prev ? prev->allnext : of_allnodes;
for (; np != NULL; np = np->allnext)
if (of_node_get(np))
break;
of_node_put(prev);
- read_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
return np;
}
EXPORT_SYMBOL(of_find_all_nodes);
@@ -274,11 +275,12 @@ static int __of_device_is_compatible(const struct device_node *device,
int of_device_is_compatible(const struct device_node *device,
const char *compat)
{
+ unsigned long flags;
int res;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
res = __of_device_is_compatible(device, compat);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return res;
}
EXPORT_SYMBOL(of_device_is_compatible);
@@ -340,13 +342,14 @@ EXPORT_SYMBOL(of_device_is_available);
struct device_node *of_get_parent(const struct device_node *node)
{
struct device_node *np;
+ unsigned long flags;
if (!node)
return NULL;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = of_node_get(node->parent);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_get_parent);
@@ -365,14 +368,15 @@ EXPORT_SYMBOL(of_get_parent);
struct device_node *of_get_next_parent(struct device_node *node)
{
struct device_node *parent;
+ unsigned long flags;
if (!node)
return NULL;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
parent = of_node_get(node->parent);
of_node_put(node);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return parent;
}
@@ -388,14 +392,15 @@ struct device_node *of_get_next_child(const struct device_node *node,
struct device_node *prev)
{
struct device_node *next;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = prev ? prev->sibling : node->child;
for (; next; next = next->sibling)
if (of_node_get(next))
break;
of_node_put(prev);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return next;
}
EXPORT_SYMBOL(of_get_next_child);
@@ -413,7 +418,7 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
{
struct device_node *next;
- read_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
next = prev ? prev->sibling : node->child;
for (; next; next = next->sibling) {
if (!of_device_is_available(next))
@@ -422,7 +427,7 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
break;
}
of_node_put(prev);
- read_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
return next;
}
EXPORT_SYMBOL(of_get_next_available_child);
@@ -460,14 +465,15 @@ EXPORT_SYMBOL(of_get_child_by_name);
struct device_node *of_find_node_by_path(const char *path)
{
struct device_node *np = of_allnodes;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
for (; np; np = np->allnext) {
if (np->full_name && (of_node_cmp(np->full_name, path) == 0)
&& of_node_get(np))
break;
}
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_by_path);
@@ -487,15 +493,16 @@ struct device_node *of_find_node_by_name(struct device_node *from,
const char *name)
{
struct device_node *np;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext)
if (np->name && (of_node_cmp(np->name, name) == 0)
&& of_node_get(np))
break;
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_by_name);
@@ -516,15 +523,16 @@ struct device_node *of_find_node_by_type(struct device_node *from,
const char *type)
{
struct device_node *np;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext)
if (np->type && (of_node_cmp(np->type, type) == 0)
&& of_node_get(np))
break;
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_by_type);
@@ -547,8 +555,9 @@ struct device_node *of_find_compatible_node(struct device_node *from,
const char *type, const char *compatible)
{
struct device_node *np;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
if (type
@@ -559,7 +568,7 @@ struct device_node *of_find_compatible_node(struct device_node *from,
break;
}
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_compatible_node);
@@ -581,8 +590,9 @@ struct device_node *of_find_node_with_property(struct device_node *from,
{
struct device_node *np;
struct property *pp;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
for (pp = np->properties; pp; pp = pp->next) {
@@ -594,7 +604,7 @@ struct device_node *of_find_node_with_property(struct device_node *from,
}
out:
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_with_property);
@@ -635,10 +645,11 @@ const struct of_device_id *of_match_node(const struct of_device_id *matches,
const struct device_node *node)
{
const struct of_device_id *match;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
match = __of_match_node(matches, node);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return match;
}
EXPORT_SYMBOL(of_match_node);
@@ -662,11 +673,12 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from,
{
struct device_node *np;
const struct of_device_id *m;
+ unsigned long flags;
if (match)
*match = NULL;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
m = __of_match_node(matches, np);
@@ -677,7 +689,7 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from,
}
}
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_matching_node_and_match);
@@ -720,12 +732,12 @@ struct device_node *of_find_node_by_phandle(phandle handle)
{
struct device_node *np;
- read_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
for (np = of_allnodes; np; np = np->allnext)
if (np->phandle == handle)
break;
of_node_get(np);
- read_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
return np;
}
EXPORT_SYMBOL(of_find_node_by_phandle);
@@ -1197,18 +1209,18 @@ int of_add_property(struct device_node *np, struct property *prop)
return rc;
prop->next = NULL;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = &np->properties;
while (*next) {
if (strcmp(prop->name, (*next)->name) == 0) {
/* duplicate ! don't insert it */
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return -1;
}
next = &(*next)->next;
}
*next = prop;
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
#ifdef CONFIG_PROC_DEVICETREE
/* try to add to proc as well if it was initialized */
@@ -1238,7 +1250,7 @@ int of_remove_property(struct device_node *np, struct property *prop)
if (rc)
return rc;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = &np->properties;
while (*next) {
if (*next == prop) {
@@ -1251,7 +1263,7 @@ int of_remove_property(struct device_node *np, struct property *prop)
}
next = &(*next)->next;
}
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
if (!found)
return -ENODEV;
@@ -1291,7 +1303,7 @@ int of_update_property(struct device_node *np, struct property *newprop)
if (!oldprop)
return of_add_property(np, newprop);
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = &np->properties;
while (*next) {
if (*next == oldprop) {
@@ -1305,7 +1317,7 @@ int of_update_property(struct device_node *np, struct property *newprop)
}
next = &(*next)->next;
}
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
if (!found)
return -ENODEV;
@@ -1378,12 +1390,12 @@ int of_attach_node(struct device_node *np)
if (rc)
return rc;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np->sibling = np->parent->child;
np->allnext = of_allnodes;
np->parent->child = np;
of_allnodes = np;
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
of_add_proc_dt_entry(np);
return 0;
@@ -1426,17 +1438,17 @@ int of_detach_node(struct device_node *np)
if (rc)
return rc;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
if (of_node_check_flag(np, OF_DETACHED)) {
/* someone already detached it */
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return rc;
}
parent = np->parent;
if (!parent) {
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return rc;
}
@@ -1463,7 +1475,7 @@ int of_detach_node(struct device_node *np)
}
of_node_set_flag(np, OF_DETACHED);
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
of_remove_proc_dt_entry(np);
return rc;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 12:57:42 +0000