linux-kernel - Re: arm qemu test failures due to 'driver-core: platform: probe of-devices only using list of compatibles'

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

Date:	Mon, 15 Feb 2016 08:58:18 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>
Subject: Re: arm qemu test failures due to 'driver-core: platform: probe
 of-devices only using list of compatibles'

On Mon, Feb 15, 2016 at 09:17:50AM +0100, Uwe Kleine-König wrote:
> Hello Russell,
> 
> On Sun, Feb 14, 2016 at 08:07:55PM +0000, Russell King - ARM Linux wrote:
> > On Sun, Feb 14, 2016 at 08:55:01PM +0100, Uwe Kleine-König wrote:
> > > So the unexpected abnormality here is that even though this device is
> > > instantiated by dt, the driver doesn't provide any compatibles.
> > > Either my expectation is wrong, then 67d02a1bbb33455 should be reverted
> > 
> > Your expectation is wrong.  AMBA primecell devices have hardware IDs
> > and are matched to their drivers by those IDs.  Just like PCI.
> 
> pci devices don't appear in dt, do they? I don't see the connection
> between amba devices and platform devices, see my other mail in this
> thread for some more details.

They both have hardware IDs, and they are both matched via those hardware
IDs.

Your change has introduced a regression and is therefore wrong.

-- 
RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.