Public bug reported:
This PR applies Crusoe's patch for NVbug 463949 that removes the
unclaimed address space gap that led to dropped writes and DPCs when
DMAs targeted the gap.
We don't cherry-pick the upstream commits this adapted patch is based on
because Crusoe's change is equivalent to mainline 6a5e64c and a3b93b4,
which depend on 2499f53 and don't apply to 6.8.
Testing:
Observed the gaps disappear on GB300 + no longer showing Unsupported Request or
silently dropped memory write while reading from nvme at the previous gap
address, nor any data transfer error when issuing an NVMe write whose buffer is
at the previous gap address.
** Affects: linux-nvidia (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2172847
Title:
Prevent charging zero-size bridge windows to required size
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