|SUCCESS| net/idpf: add 400G link speed support

[dpdklab at iol.unh.edu]

Test-Label: ai-code-review
Test-Status: SUCCESS
https://dpdk.org/patch/172209

_AI Code Review_

=== Patch Review: series.patch (via Claude) ===
Review date: 2026-10-28

# Review of DPDK Patch: net/idpf: add 400G link speed support

## ERRORS

None.

## WARNINGS

None.

## INFO

The patch correctly adds 400 Gbps link speed support to the idpf PMD by appending `RTE_ETH_SPEED_NUM_400G` to the `idpf_supported_speeds[]` array. The implementation follows the existing pattern and maintains alphabetical/numerical ordering of speed entries.

**Code quality observations:**
- The fix is minimal and targeted, addressing only the missing speed mapping
- Array initialization preserves the existing comma-separated style
- The change is consistent with how other link speeds are handled in the driver

**Documentation note:**
While the patch description clearly explains the bug (devices reporting "Unknown" speed at 400G), this is a driver bug fix that affects user-visible behavior. Consider whether this should be mentioned in the release notes under "Fixed Issues" for the idpf PMD, though the guidelines indicate that minor bug fixes in drivers may not require release notes depending on project policy.

Review-Result: CLEAN