linux-kernel - Re: [PATCH] USB Elan FTDI: check for driver registration status

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Date:	Wed, 28 Mar 2007 20:00:32 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
Cc:	Pete Zaitcev <zaitcev@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel-list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] USB Elan FTDI: check for driver registration status

Pete, Luiz

check this one please.

I've inspected ftdi-elan.c for style and as result
the solution I propose is just to add explicit
destroying of worqueues if usb_register failed.

And Pete, take a look - whoa! - I've renamed error labels :)


		Cyrill

---

 drivers/usb/misc/ftdi-elan.c |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index bc3327e..d9cbdb8 100644
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -2910,24 +2910,28 @@ static int __init ftdi_elan_init(void)
         INIT_LIST_HEAD(&ftdi_static_list);
         status_queue = create_singlethread_workqueue("ftdi-status-control");
 	if (!status_queue)
-		goto err1;
+		goto err_status_queue;
         command_queue = create_singlethread_workqueue("ftdi-command-engine");
 	if (!command_queue)
-		goto err2;
+		goto err_command_queue;
         respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
 	if (!respond_queue)
-		goto err3;
+		goto err_respond_queue;
         result = usb_register(&ftdi_elan_driver);
-        if (result)
+        if (result) {
+		destroy_workqueue(status_queue);
+		destroy_workqueue(command_queue);
+		destroy_workqueue(respond_queue);
                 printk(KERN_ERR "usb_register failed. Error number %d\n",
 		       result);
+	}
         return result;
 
- err3:
+ err_respond_queue:
 	destroy_workqueue(command_queue);
- err2:
+ err_command_queue:
 	destroy_workqueue(status_queue);
- err1:
+ err_status_queue:
 	printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name);
 	return -ENOMEM;
 }
-
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