On Tue, Feb 25, 2020 at 09:12:48PM -0600, Trevor Jacobs wrote: > That's correct, I tested a bunch of the old distros including slackware, > and 2.6.32 is where the problem began. > > Also, the Panasonic Toughbook CF-29s effected that we tested are the > later marks, MK4 and MK5 for certain. The MK2 CF-29 worked just fine > because it has different hardware supporting the PCMCIA slots. I have > not tested a MK3 but suspect it would work ok as it also uses the older > hardware. > > Thanks for your help guys! > Trevor > Right, the distros probably all enabled MMC_RICOH_MMC earlier than upstream. Can you test a custom kernel based off your distro kernel but just disabling that config option? That's probably the easiest fix currently, even though not ideal. Perhaps there should be a command line option to disable specific pci quirks to make this easier. An ideal fix is I feel hard, given this quirk is based on undocumented config registers -- it worked on Dell machines (that's where the original authors seem to have gotten their info from), perhaps they had only one Cardbus slot, but the code ends up disabling your second Cardbus slot instead of disabling the MMC controller.
