[RFC PATCH 0/3] mips: ralink: mt7621: fix too-early kzalloc

[John Thomson]

ralink mt7621 attempts to use kzalloc before normal memory management is
available.
Before v6.1-rc1, mt7621.c soc_dev_init silently failed to kzalloc and
returned in soc_dev_init, but continued to boot without the soc device
registered.
After, kernel crashes before it outputs any console messages

This was bisected to an mm/slub change (detailed in patch 3)

RFC due to
- probably a (much) better way to do this
- do not have mt7621 device with PCIe to test
  drivers/phy/ralink/phy-mt7621-pci.c
- should this reference a commit as Fixes?