[FS#384] IPQ806X: CMD: swconfig on R7800 generate Kernel Panic!

[LEDE Bugs]

The following task has a new comment added:

FS#384 - IPQ806X: CMD: swconfig on R7800 generate Kernel Panic!
User who did this - dissent1 (dissent1)

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It's an old issue. I've noticed this issue since first commit that enabled support for r7800 in lede when I've tried to configure the switch in luci right after reboot. 
I do not face it anymore after recent patches for swconfig and ar8xxx driver ported from chromium.
Just FYI after the hang is triggered you can wait for about 2 minutes and the functionality gets restored.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=384#comment1240