i2c-isa: Fail adding driver on attach_adapter error

i2c-isa: Fail adding driver on attach_adapter error

Signed-off-by: David Hubbard <david.c.hubbard@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/i2c/busses/i2c-isa.c b/drivers/i2c/busses/i2c-isa.c
index d7486e58606..7a8d2c148a8 100644
--- a/drivers/i2c/busses/i2c-isa.c
+++ b/drivers/i2c/busses/i2c-isa.c
@@ -89,9 +89,14 @@ int i2c_isa_add_driver(struct i2c_driver *driver)
         dev_dbg(&isa_adapter.dev, "Driver %s registered\n", driver->driver.name);
 
         /* Now look for clients */
-        driver->attach_adapter(&isa_adapter);
-
-        return 0;
+        res = driver->attach_adapter(&isa_adapter);
+        if (res) {
+                dev_err(&isa_adapter.dev,
+                        "Driver %s failed to attach adapter, unregistering\n",
+                        driver->driver.name);
+                driver_unregister(&driver->driver);
+        }
+        return res;
 }
 
 int i2c_isa_del_driver(struct i2c_driver *driver)