From: Cornelia Huck <cornelia.huck@de.ibm.com>
To: Kay Sievers <kay.sievers@vrfy.org>
Cc: "Pierre Ossman" <drzeus-list@drzeus.cx>,
"Greg KH" <greg@kroah.com>, LKML <linux-kernel@vger.kernel.org>,
"Kristian Høgsberg" <krh@bitplanet.net>
Subject: Re: Race free attributes in sysfs
Date: Tue, 22 May 2007 10:38:57 +0200 [thread overview]
Message-ID: <20070522103857.17bf1a3e@gondolin.boeblingen.de.ibm.com> (raw)
In-Reply-To: <1179775695.3320.82.camel@lov.localdomain>
On Mon, 21 May 2007 21:28:15 +0200,
Kay Sievers <kay.sievers@vrfy.org> wrote:
> We could change the driver-core to suppress the creation of an attribute
> if the attribute's show() or store() method returns something like
> -ENOENT at registration time?
> The driver would pass _all_ possible attributes of the device at
> registration time, but the core would only create the attributes which
> are implemented for this particular device? Would that work for you?
>
> There are already subsystems who need to do similar things internally
> (firewire), and it may be nice to add such functionality to the core.
This sounds a bit hackish (overloading the meaning of the show() and
store() methods).
> You can assign any number of attribute groups to the device. If they
> don't have a group name, they will all be created directly at the device
> level. Would that work for you?
What about generic "conditional attribute groups"? Add a check() method
which is called just before adding them, and only add them if check()
returned 0 (or doesn't exist)?
next prev parent reply other threads:[~2007-05-22 8:39 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-20 11:01 Pierre Ossman
2007-05-21 3:12 ` Dmitry Torokhov
2007-05-21 7:47 ` Pierre Ossman
2007-05-22 21:24 ` Mark Lord
2007-05-23 2:43 ` Dmitry Torokhov
2007-05-23 4:21 ` Greg KH
2007-05-23 13:27 ` Mark Lord
2007-05-23 15:14 ` Greg KH
2007-05-26 16:12 ` Bill Davidsen
2007-05-27 8:57 ` Greg KH
2007-05-21 17:50 ` Kay Sievers
2007-05-21 18:43 ` Pierre Ossman
2007-05-21 19:28 ` Kay Sievers
2007-05-22 8:38 ` Cornelia Huck [this message]
2007-05-23 4:25 ` Greg KH
2007-05-22 15:40 ` Pierre Ossman
2007-05-22 15:58 ` Kristian Høgsberg
2007-05-22 21:25 ` Mark Lord
2007-05-23 4:24 ` Greg KH
2007-05-23 5:44 ` Pierre Ossman
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