linux-kernel - Re: [PATCH] WIFI: handle a neglected case in nl80211_new

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Date:	Thu, 28 Nov 2013 13:21:37 +0800
From:	Chao Bi <chao.bi@...el.com>
To:	Ujjal Roy <royujjal@...il.com>
Cc:	Johannes Berg <johannes@...solutions.net>,
	"John W. Linville" <linville@...driver.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-wireless@...r.kernel.org
Subject: Re: [PATCH] WIFI: handle a neglected case in
 nl80211_new_interface()

On Thu, 2013-11-28 at 11:53 +0800, Chao Bi wrote:
> On Wed, 2013-11-27 at 20:43 +0530, Ujjal Roy wrote:
> > Hi,
> > 
> > 
> > We can use IS_ERR_OR_NULL(wdev) to check NULL as well as error value.
> > 
> > Thanks,
> > UjjaL
> > 
> > On Wed, Nov 27, 2013 at 8:30 AM, Chao Bi <chao.bi@...el.com> wrote:
> >         In nl80211_new_interface(), it calls rdev_add_virtual_intf() to create
> >         a new interface, however, it only checks whether returned value is err
> >         code, but doesn't check if returned value is NULL. The returned 
> 
> Thanks Ujjal. I'll update it.
> 
Hi all,
This patch is not valid, I further check the nl80211 API introduce,
don't need to handle this NULL return value because it bans NULL
feedback of add_virtual_intf() API in cfg80211.h.

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