HID: fix hidinput_connect ignoring retval from input_register_device

hidinput_connect() ignores retval from input_register_device(). Fix it
by properly undoing all the registrations that have been already done,
and return error.

Signed-off-by: Dirk Hohndel <hohndel@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index dd332f2..71eb769 100644 (file)
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1152,7 +1152,7 @@ int hidinput_connect(struct hid_device *hid)
                                        kfree(hidinput);
                                        input_free_device(input_dev);
                                        err_hid("Out of memory during hid input probe");
-                                       return -1;
+                                       goto out_unwind;
                                }
 
                                input_set_drvdata(input_dev, hid);
@@ -1186,15 +1186,25 @@ int hidinput_connect(struct hid_device *hid)
                                 * UGCI) cram a lot of unrelated inputs into the
                                 * same interface. */
                                hidinput->report = report;
-                               input_register_device(hidinput->input);
+                               if (input_register_device(hidinput->input))
+                                       goto out_cleanup;
                                hidinput = NULL;
                        }
                }
 
-       if (hidinput)
-               input_register_device(hidinput->input);
+       if (hidinput && input_register_device(hidinput->input))
+               goto out_cleanup;
 
        return 0;
+
+out_cleanup:
+       input_free_device(hidinput->input);
+       kfree(hidinput);
+out_unwind:
+       /* unwind the ones we already registered */
+       hidinput_disconnect(hid);
+
+       return -1;
 }
 EXPORT_SYMBOL_GPL(hidinput_connect);