linux-kernel - Re: [PATCH 3/3] Drop platform sysfs support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <1250631934.5150.3.camel@localhost.localdomain>
Date:	Tue, 18 Aug 2009 14:45:34 -0700
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Alan Jenkins <sourcejedi.lkml@...glemail.com>
Cc:	Mario Limonciello <mario_limonciello@...l.com>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	cezary.jackiewicz@...il.com
Subject: Re: [PATCH 3/3] Drop platform sysfs support

Hi Alan,

> >> In practice I suspect it makes no difference that the rfkill and
> >> backlight devices are exported as virtual devices with no physical
> >> parent.  I just don't think it's "right" :-).
> >
> > it actually does make a difference for hardware detection. We wanna have
> > them hanging of the compal platform device.
> 
> Ok.  I wasn't sure that userspace was allowed to rely on that, but I
> re-read Documentation/ABI/testing/sysfs-devices and I see now that it
> can be allowed.
> 
> Some of these issues with the compal-laptop work may come from copying
> dell-laptop.  dell-laptop is the only driver which creates rfkill
> devices without a parent device.  In fact, it doesn't even create a
> platform device :-).

then that should be fixed. All RFKILL switches should really have a
parent and not dangling around the virtual tree. Especially since they
have physical hardware in the system.

> I'll try sending a patch or two to clean up dell-laptop.  I don't have
> the hardware but it should be pretty mechanical, almost a copy+paste
> job from a "good" driver.

That would be good. I don't have the hardware either, but others here
can test it.

Regards

Marcel


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/