Re: [PATCH 23/38] mmc: sdhci: convert sdhci_set_uhs_signaling() into a library function

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On 06/19/2014 06:28 AM, Russell King - ARM Linux wrote:
> On Mon, Jun 16, 2014 at 02:17:30PM +0200, Ulf Hansson wrote:
>> Anyway, we did get some folks to test the patches and was thus fairly
>> confident that we could merge them. Chris asked me to try to collect
>> them in a PR for him, so I did. Sorry if I managed to screw some
>> things up, there were several conflicts and actual regressions, which
>> I tried to take care of.
>>
>> The mmc people were also very helping in sending patches to fixup
>> related regressions, immediately after we merged your patchset. Thus
>> together I think we managed to pull it off.
> 
> I tend to look through slightly less rose-tinted glasses.
> 
> The fact is... there's loads of ARM platforms which now fail in Olof's
> build/boot testing, and they all seem to have a very similar pattern:
> 
> hummingboard:
> [    1.149688] sdhci: Secure Digital Host Controller Interface driver
> [    1.155901] sdhci: Copyright(c) Pierre Ossman
> ...
> [    1.253630] Waiting for root device /dev/mmcblk0p2...
> [   60.325469] imx-sdma 20ec000.sdma: firmware not found
> ~$off
> # PYBOOT: Exception: timeout
> 
> jetson:
> [    2.261355] Waiting for root device /dev/mmcblk0p1...
> 
> wandboard:
> [    1.186870] sdhci: Secure Digital Host Controller Interface driver
> [    1.193075] sdhci: Copyright(c) Pierre Ossman
> ...
> [    1.291064] Waiting for root device /dev/mmcblk0p2...

Any SDHCI failures in Linus' tree (but not linux-next) that occur only
in multi_v7_defconfig are likely solved by:

http://lists.infradead.org/pipermail/linux-arm-kernel/2014-June/264012.html

[PATCH] ARM: multi_v7_defconfig: re-enable SDHCI drivers

> Whether these are caused by the patch set or not is anyone's guess,
> because we (a) don't know what's causing these failures, and (b)
> my patch series was never tested on anything but iMX6.

I thought that I'd tested at least some of it on Tegra.
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