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

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Date:	Mon, 15 Feb 2016 11:59:09 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-next@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: arm qemu test failures due to 'driver-core: platform: probe
 of-devices only using list of compatibles'

Hello Guenter,

On Sun, Feb 14, 2016 at 08:50:10AM -0800, Guenter Roeck wrote:
> Uwe,
> 
> Your patch 'driver-core: platform: probe of-devices only using list of
> compatibles' causes the following qemu tests to crash in -next.
> 
> arm:vexpress-a9:vexpress_defconfig:vexpress-v2p-ca9
> arm:vexpress-a15:vexpress_defconfig:vexpress-v2p-ca15-tc1
> arm:vexpress-a9:multi_v7_defconfig:vexpress-v2p-ca9
> arm:vexpress-a15:multi_v7_defconfig:vexpress-v2p-ca15-tc1
> 
> Crash log:
> 
> VFS: Cannot open root device "mmcblk0" or unknown-block(0,0): error -6
> Please append a correct "root=" boot option; here are the available partitions:
> 1f00          131072 mtdblock0  (driver?)
> 1f01           32768 mtdblock1  (driver?)
> Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Can you provide a complete boot log? This might already reveal which
device is failing. It might not be the mmci device but something it
depends on (clock, bus parent, irq).

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |