linux-kernel - Re: [PATCH] driver: make dev_set

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Date:	Tue, 28 Apr 2009 07:51:44 -0700
From:	Greg KH <gregkh@...e.de>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Kay Sievers <kay.sievers@...y.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH] driver: make dev_set_name(, NULL) work

On Tue, Apr 28, 2009 at 12:36:06AM -0700, Yinghai Lu wrote:
> 
> while looking dev_set_name() calling, there is one
> 	dev_set_name(&dev->dev, NULL)
> to used to try to free the device name, before kfree that device.

What's wrong with that?

> need to move the check for device_add in
> | commit 8a577ffc75d9194fe8cdb7479236f2081c26ca1f
> | Author: Kay Sievers <kay.sievers@...y.org>
> | Date:   Sat Apr 18 15:05:45 2009 -0700
> |
> |    driver: dont update dev_name via device_add path
> from kobject_set_name_vargs to kobject_add_vargs instead.
> 
> in kobject_set_name_vargs will check if fmt is NULL.
> 
> actually we need to use dev_set_name(,NULL) later on failing path
> and release to prevent leaking

Are you sure?

confused,

greg k-h
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