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[Armbian build PR] - Add an attempt counter, which helps buggy PCIe links.


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Description

For the past few years, I've seen dozens of posts with people having the same PCIe link training gen1 timeout! error as I've been running into.

I noticed I could workaround the issue myself by unloading and loading the module to get it working, but that's a dirty userspace hack that shouldn't be needed. We can just retry the training code a few times.

How Has This Been Tested?

  • [X] Ran on a NanoPi R4SE that was previously unable to reliably have it's PCIe ethernet trained.

Checklist:

  • [X] My code follows the style guidelines of this project
  • [X] I have performed a self-review of my own code
  • [X] I have commented my code, particularly in hard-to-understand areas
  • [X] I have made corresponding changes to the documentation
  • [X] My changes generate no new warnings
  • [X] Any dependent changes have been merged and published in downstream modules

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