From: David Miller <davem@davemloft.net>
To: kvalo@adurom.com
Cc: netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 0/2] Fix uevent race in register_netdevice()
Date: Mon, 16 May 2011 14:11:58 -0400 (EDT) [thread overview]
Message-ID: <20110516.141158.1777924960833804150.davem@davemloft.net> (raw)
In-Reply-To: <20110516143913.13838.85357.stgit@localhost6.localdomain6>
From: Kalle Valo <kvalo@adurom.com>
Date: Mon, 16 May 2011 17:46:30 +0300
> I'm trying to fix a race in register_netdevice(). The problem is that
> there's a uevent to userspace before the netdevice is ready for use. The
> problem is described here:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=15606
>
> I have sent few different ways to fix this, but none of them have been
> really usable. Now I came up with a way which changes the driver core
> to make it possible send the uevent in a separate call. This is a clean
> and safe way to fix the race. Downside is that two new functions are
> added to the driver core interface.
>
> Please comment.
This doesn't work.
The sysfs file will still be there before the uevent, so any
process can go in there, and see the inconsistent state.
next prev parent reply other threads:[~2011-05-16 18:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-16 14:46 [PATCH v3 0/2] Fix uevent race in register_netdevice() Kalle Valo
2011-05-16 14:46 ` [PATCH v3 1/2] driver core: add device_add_noevent() and device_uevent() Kalle Valo
2011-05-16 14:46 ` [PATCH v3 2/2] net: postpone net device uevent to fix a race Kalle Valo
2011-05-16 18:11 ` David Miller [this message]
2011-05-20 12:08 ` [PATCH v3 0/2] Fix uevent race in register_netdevice() Kalle Valo
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