Re: powerpc/83xx: fix use-after-free on mpc831x_usb_cfg()

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The np variable is still being used after the of_node_put() call,

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which may result in use-after-free.

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We fix this issue by calling of_node_put() after the last usage.

I imagine that this commit description can be improved a bit more
(by mentioning the influence of “immr_node”?).
How do you think about to omit the word “We” here?

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This patatch also do some cleanup.

Should the renaming of a jump label be contributed in a separate update
step of a small patch series besides a wording without a typo?

Thank you for your comments.
We will improve the commit description and send v2 as soon as possible.

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Regards,
Wen