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

[Bjorn Helgaas]

[+cc Sherry, author of 610fa91d9863, Richard, Mani, linux-pci]

On Mon, Jun 29, 2026 at 11:34:32AM -0300, Leonardo Costa wrote:
> Hello,
> 
> 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:
> 
>     https://gist.github.com/lcosta37/53efdb2fb6e6e0fc05437c7e53b47737
> 
> The kernel logs stop almost immediately as the board starts to boot, and I 
> don't notice any difference in the logs that points to the cause.
> 
> Is this known? We are seeing this behavior on all Apalis iMX6 modules, though
> we don't see it on Colibri iMX6, so it is not SoC-specific.

This regression is listed on
https://linux-regtracking.leemhuis.info/regzbot/mainline/ as being
caused by
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=master&id=610fa91d9863
("PCI: imx6: Assert PERST# before enabling regulators") but I can't
find any bisect or other report that specifically points to
610fa91d9863.

Can somebody confirm that reverting 610fa91d9863 fixes this
regression, or at least that 610fa91d9863^ works and 610fa91d9863
fails?

Bjorn