Hi Rob, I can no longer boot my old Mac Mini G4 using a custom config. After a tedious bisect it appears that (*). Since Mac Mini does not provide any serial port I cannot provide a kernel message dump (wish there was some kind of null modem serial cable). All I can see is some crazy stuff going on with ATA DMA/66 & DMA/100.
Is there anything suspicious in this commit which may prevent this machine to boot ? Thanks much, (*) $ git bisect good 59f47eff03a08cd2d91310f1c15a5343fa0071e5 is the first bad commit commit 59f47eff03a08cd2d91310f1c15a5343fa0071e5 Author: Rob Herring <r...@kernel.org> Date: Thu Jan 4 15:12:14 2018 -0600 powerpc/pci: Use of_irq_parse_and_map_pci() helper Instead of calling both of_irq_parse_pci() and irq_create_of_mapping(), call of_irq_parse_and_map_pci(), which does the same thing. This will allow making of_irq_parse_pci() a private, static function. This changes the logic slightly in that the fallback path will also be taken if irq_create_of_mapping() fails internally. Signed-off-by: Rob Herring <r...@kernel.org> [bhelgaas: fold in virq init from Stephen Rothwell <s...@canb.auug.org.au>] Signed-off-by: Bjorn Helgaas <bhelg...@google.com> Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> Cc: Paul Mackerras <pau...@samba.org> Cc: Michael Ellerman <m...@ellerman.id.au> :040000 040000 b979406deb8957af240d659be1e76ed75fa43288 ec3c127fe30428955e2ad1d716c9be2adbd2623d M arch