Re: [PATCH] INPUT: fix hidinput_connect ignoring retval from input_register_device

[Dirk Hohndel <hohndel@linux.intel.com>]

[sorry - mail config screwup caused this to bounce for the more restrictive
of the recipient addresses, including the mailing lists, so resending again]

On Mon, Oct 29, 2007 at 06:28:36PM +0100, Jiri Kosina wrote:                                                                                                                 
>                                                                                                                                                                            
> > Would something like this work?                                                                                                                                          
>                                                                                                                                                                            
> Yes, I think that this patch is in principle fine, modulo the redundant                                                                                                    
> NULL-ptr checks.                                                                                                                                                           
                                                                                                                                                                             
Thanks everyone with helping me to get this right! Which I hope this one is :-)                                                                                              
                                                                                                                                                                             
/D                                                                                                                                                                           


[PATCH] hidinput_connect ignores retval from input_register_device

signed-off-by: Dirk Hohndel <hohndel@linux.intel.com>

---
 drivers/hid/hid-input.c |   18 ++++++++++++++----
 1 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index dd332f2..aa9b52d 100644
--- 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);
 
-- 
gitgui.0.8.4.g8d863