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Message-ID: <570F5ADE.1010500@fivetechno.de>
Date:	Thu, 14 Apr 2016 10:54:54 +0200
From:	Markus Reichl <m.reichl@...etechno.de>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, linux-kernel@...r.kernel.org,
	linux-mmc@...r.kernel.org,
	Javier Martinez Canillas <javier@....samsung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [next] Failing Odroid XU3 boot due to missing MMC device

Am 14.04.2016 um 10:45 schrieb Russell King - ARM Linux:
> On Thu, Apr 14, 2016 at 10:31:12AM +0200, Markus Reichl wrote:
>> Hi Krzysztof,
>>
>> yes, observed this with linux-next from yesterday 13.
>>
>> I boot from eMMC.
>> Device numbering of eMMC and SD are exchanged now.
>>
>> I solved the boot problem by changing the rootdev in U-Boot env
>> from /dev/mmcblk0p2 to /dev/mmcblk1p2.
>>
>> Changed /etc/fdisk, too, to mount /dev/mmcblk1p1 to /boot.     
> 
> You really should mount by partition uuid - supplying something like:
> 
> 	root=PARTUUID=f3ae567e-02
> 
> on the kernel command line.  This makes the mounting of rootfs
> independent of which device carries the filesystem.
> 
> If you're not using an initramfs, the kernel prints the partuuid
> values if it doesn't find the rootfs.  I don't know how to get the
> partuuids without going through that process, sorry.

lsblk --output PARTUUID

> 

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