Possible Regression due to c074fef5d36e ("of/platform: Defer probes of registered devices").

Russell King - ARM Linux linux at arm.linux.org.uk
Mon Oct 26 03:41:49 PDT 2015

On Mon, Oct 26, 2015 at 10:56:03AM +0100, Geert Uytterhoeven wrote:
> On Mon, Oct 26, 2015 at 10:40 AM, Sylvain Rochet
> <sylvain.rochet at finsecur.com> wrote:
> > On Mon, Oct 26, 2015 at 12:20:39PM +0900, Simon Horman wrote:
> >> I have observed a possible regression in next-20151022
> >> due to c074fef5d36e ("of/platform: Defer probes of registered devices").
> >>
> >> The problem manifests on the r8a7791 based koelsch board.
> >> With the above patch present booting the board using the shmobile_defconfig
> >> results in no console output. While after reverting the above patch
> >> the boot proceeds all the way to user-space.
> >>
> >> With DEBUG_LL and EARLY_PRINTK enabled I was able to capture some console
> >> output. I have included both that boot log, and a log of boot all the way to
> >> userspace with the patch in question reverted.
> >>
> >> The problem does not seem to manifiest on other boards for other
> >> Renesas ARM  SoCs that I have access too. In particular the
> >> r8a7790 based lager board; the r8a7790 and r8a7791 are both members
> >> of the R-Car Gen2 family of SoCs.
> >
> > Atmel SoC hit this regresssion too, discussion about this issue is in
> > the following thread:
> >  https://lkml.org/lkml/2015/10/16/733
> More reading material in "[GIT PULL] On-demand device probing"
> (https://lkml.org/lkml/2015/10/14/126)

It's quite obvious from the thread that the on-demand device probing is
*not* going to be merged for 4.4, and so it should not be in linux-next
at all.  Having it in linux-next, it's disrupting people's testing of
the 4.4 merge window material.

Tomeu, please remove it so people can continue to test material
sheduled for the 4.4 merge window.  Thanks.

FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

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