Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[cascardo/linux.git] / drivers / base / driver.c

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 9a6537f..2ef5acf 100644 (file)
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -217,12 +217,22 @@ static void driver_remove_groups(struct device_driver *drv,
 int driver_register(struct device_driver *drv)
 {
        int ret;
+       struct device_driver *other;
 
        if ((drv->bus->probe && drv->probe) ||
            (drv->bus->remove && drv->remove) ||
            (drv->bus->shutdown && drv->shutdown))
                printk(KERN_WARNING "Driver '%s' needs updating - please use "
                        "bus_type methods\n", drv->name);
+
+       other = driver_find(drv->name, drv->bus);
+       if (other) {
+               put_driver(other);
+               printk(KERN_ERR "Error: Driver '%s' is already registered, "
+                       "aborting...\n", drv->name);
+               return -EEXIST;
+       }
+
        ret = bus_add_driver(drv);
        if (ret)
                return ret;