[PATCH 0/6][Focal] 5.4 kernel: when iommu is on crashdump fails

[Tim Gardner]

[SRU Justification]

BugLink: https://bugs.launchpad.net/bugs/1922738

When iommu is enabled crashdump fails to be collected because crash-kernel crashes.

See extended SRU justification in the bug report.

[Test Plan]
Enable crashdump, cause a fault.

[Where problems could occur]
Released in stable updates:
linux-5.5.y

[Other Info]
None