diff options
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/include/asm/prom.h | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/prom.c | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/prom.h b/arch/sparc/include/asm/prom.h index fd55522481c..b5efc4d8523 100644 --- a/arch/sparc/include/asm/prom.h +++ b/arch/sparc/include/asm/prom.h @@ -18,6 +18,7 @@ */ #include <linux/types.h> #include <linux/proc_fs.h> +#include <linux/mutex.h> #include <asm/atomic.h> #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 2 @@ -73,6 +74,7 @@ struct of_irq_controller { extern struct device_node *of_find_node_by_cpuid(int cpuid); extern int of_set_property(struct device_node *node, const char *name, void *val, int len); +extern struct mutex of_set_property_mutex; extern int of_getintprop_default(struct device_node *np, const char *name, int def); diff --git a/arch/sparc/kernel/prom.c b/arch/sparc/kernel/prom.c index cd4fb79aa3a..43e86240682 100644 --- a/arch/sparc/kernel/prom.c +++ b/arch/sparc/kernel/prom.c @@ -54,6 +54,9 @@ int of_getintprop_default(struct device_node *np, const char *name, int def) } EXPORT_SYMBOL(of_getintprop_default); +DEFINE_MUTEX(of_set_property_mutex); +EXPORT_SYMBOL(of_set_property_mutex); + int of_set_property(struct device_node *dp, const char *name, void *val, int len) { struct property **prevp; @@ -77,7 +80,10 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len void *old_val = prop->value; int ret; + mutex_lock(&of_set_property_mutex); ret = prom_setprop(dp->node, (char *) name, val, len); + mutex_unlock(&of_set_property_mutex); + err = -EINVAL; if (ret >= 0) { prop->value = new_val; |