of/platform: Register of_platform_drivers with an "of:" prefix

Currently there are some drivers in tree which register both a
platform_driver and an of_platform_driver with the same name.  This is
a temporary situation until all the relevant of_platform_drivers are
converted to be normal platform_drivers.  Until then, this patch gives
all the of_platform_drivers an "of:" prefix to protect against bogus
matches and namespace conflicts.

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 30a4641e798a..bb72223c22ae 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -74,8 +74,22 @@ static void platform_driver_shutdown_shim(struct platform_device *pdev)
  */
 int of_register_platform_driver(struct of_platform_driver *drv)
 {
+        char *of_name;
+
         /* setup of_platform_driver to platform_driver adaptors */
         drv->platform_driver.driver = drv->driver;
+
+        /* Prefix the driver name with 'of:' to avoid namespace collisions
+         * and bogus matches.  There are some drivers in the tree that
+         * register both an of_platform_driver and a platform_driver with
+         * the same name.  This is a temporary measure until they are all
+         * cleaned up --gcl July 29, 2010 */
+        of_name = kmalloc(strlen(drv->driver.name) + 5, GFP_KERNEL);
+        if (!of_name)
+                return -ENOMEM;
+        sprintf(of_name, "of:%s", drv->driver.name);
+        drv->platform_driver.driver.name = of_name;
+
         if (drv->probe)
                 drv->platform_driver.probe = platform_driver_probe_shim;
         drv->platform_driver.remove = drv->remove;
@@ -91,6 +105,8 @@ EXPORT_SYMBOL(of_register_platform_driver);
 void of_unregister_platform_driver(struct of_platform_driver *drv)
 {
         platform_driver_unregister(&drv->platform_driver);
+        kfree(drv->platform_driver.driver.name);
+        drv->platform_driver.driver.name = NULL;
 }
 EXPORT_SYMBOL(of_unregister_platform_driver);