Public bug reported:
Some Pericom/Diodes PI7C9X3G606GPC switches require downstream Port 4
BAR0 to mirror the upstream port BAR0. Firmware may apply this during
boot, but Linux PCI resource assignment can move the upstream BAR0 and
leave Port 4 without the required mirror.
Add a final and resume quirk for downstream Port 4. The quirk verifies
that the immediate upstream bridge is the same switch, then writes Port 4
BAR0 from the upstream BAR0 after resource assignment and after resume.
Port 4 BAR0 may read back as zero even after a successful write, so the
write must be validated by platform-specific means.
** Affects: linux-nvidia-6.17 (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2154457
Title:
PCI: mirror PI7C9X3G606GPC Port 4 BAR0
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-nvidia-6.17/+bug/2154457/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
