[package] prevent kmod-switch from accessing nvram on brcm63xx (#5035)

[openwrt.git] / package / switch / src / switch-core.c

diff --git a/package/switch/src/switch-core.c b/package/switch/src/switch-core.c
index 87aa9729ccbd05c7e82063e8034c3edcac3507de..87306a05edb90b3577e5b3fe4eb8858690a2067a 100644 (file)
--- a/package/switch/src/switch-core.c
+++ b/package/switch/src/switch-core.c
@@ -17,7 +17,6 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  *
- * $Id: $
  *
  * Basic doc of driver's /proc interface:
  * /proc/switch/<interface>/
@@ -404,6 +403,21 @@ switch_vlan_config *switch_parse_vlan(switch_driver *driver, char *buf)
 }
 
 
+int switch_device_registered (char* device) {
+       struct list_head *pos;
+       switch_driver *new;
+
+       list_for_each(pos, &drivers.list) {
+               if (strcmp(list_entry(pos, switch_driver, list)->interface, device) == 0) {
+                       printk("There is already a switch registered on the device '%s'\n", device);
+                       return -EINVAL;
+               }
+       }
+
+       return 0;
+}
+
+
 int switch_register_driver(switch_driver *driver)
 {
        struct list_head *pos;
@@ -476,6 +490,7 @@ static void __exit switch_exit(void)
 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
 MODULE_LICENSE("GPL");
 
+EXPORT_SYMBOL(switch_device_registered);
 EXPORT_SYMBOL(switch_register_driver);
 EXPORT_SYMBOL(switch_unregister_driver);
 EXPORT_SYMBOL(switch_parse_vlan);