Re: SD card device name changed on wandboard quad.
On Sat, 2016-06-25 at 05:38 +0200, Paul Wise wrote:
> On Sat, Jun 25, 2016 at 1:48 AM, peter green wrote:
>
> > While upgrading a wandboard quad from 4.4 to 4.6 (debian armmp kernels) I
> > got a boot failure. I tracked this down to the device name for the SD card
> > changing from mmcblk0 to mmcblk2
>
> I would suggest using filesystem UUIDs if that is possible in this
> scenario, since that will avoid caring about where the kernel decides
> to put the block device within its block device namespace.
>
> > Any idea why this has changed? There don't seem to be any other
> > lower-numbered mmcblk devices.
>
> Any interesting differences in dmesg before/after?
>
> Did the DeviceTree file change?
There was a heated discussion [1] I remembered and in there it points
out change that fixed a regression in this area: commit 9aaf3437aa72
("mmc: block: Use the mmc host device index as the mmcblk device index")
I don't is that's directly relevant to this issue reported above by
Peter.
[1] http://www.gossamer-threads.com/lists/linux/kernel/2429438
--
Tixy
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