[Bug 217242] CPU hard lockup related to xhci/dma

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https://bugzilla.kernel.org/show_bug.cgi?id=217242

--- Comment #31 from Mathias Nyman (mathias.nyman@xxxxxxxxxxxxxxx) ---
Thanks, I cleaned up the debug patch and turned into a real fix.
It can be found in my tree in the fix_ring_expansion branch:

git://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git 

https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/?h=fix_ring_expansion

The larger rework of ring expansion is also done, but not very well tested.
If you can try it out as well it would be appreciated.
It can be found in the same tree in the rework_ring_expansion branch

https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/?h=rework_ring_expansion

In fear of regression I think I'll submit the smaller fix to 6.4 and older
stable kernels, and then rebase the larger rework on top of that, and submit it
to usb-next. (6.5 kernels and later)

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