Re: [REGRESSION] mainline/master: Apalis iMX6 no longer boots

[Bjorn Helgaas]

On Thu, Jul 16, 2026 at 07:16:31PM +0200, Thorsten Leemhuis wrote:
> On 7/16/26 18:40, Bjorn Helgaas wrote:
> > On Thu, Jul 16, 2026 at 02:15:42AM +0000, Hongxing Zhu (OSS) wrote:
> >>> On Mon, Jun 29, 2026 at 11:34:32AM -0300, Leonardo Costa wrote:
> >>>> We are seeing a regression on Apalis iMX6 where the kernel
> >>>> doesn't boot in the newest v7.2-rc1 (it was working before, in
> >>>> v7.1). The device tree being used is the imx6q-apalis-eval.dtb.
> >>>> The kernel configuration
> >>>> used is the one shown below:
> >> ...
> > 
> >>> Can somebody confirm that reverting 610fa91d9863 fixes this
> >>> regression, or at least that 610fa91d9863^ works and 610fa91d9863
> >>> fails?
> >>
> >> Sorry for this severe regression. I have posted a fix that has been
> >> tested on my i.MX6Q SabreSD board:
> >>
> >> https://lore.kernel.org/imx/20260708035928.580236-2-hongxing.zhu@xxxxxxxxxxx/
> > 
> > My question was whether somebody had actually bisected to 610fa91d9863
> > ("PCI: imx6: Assert PERST# before enabling regulators").  I don't see
> > anything specific on the mailing list, so I don't know how
> > 610fa91d9863 got blamed for the regression.
> 
> That was me and might have been a stupid idea. I normally wouldn't have
> added this, but a earlier message from Hongxing Zhu sounded a pretty
> convincingly like something along the lines of  "this is the problem I
> already have a fix for there" -- and then I took the commit-id from there.

Ah, ok, that explains it, thanks!  Hopefully we can get some clear
connection in the patch that eventually gets merged.