On Sun, Dec 23, 2018 at 11:28 AM Greg KH <greg@xxxxxxxxx> wrote:
>
> On Sun, Dec 23, 2018 at 08:49:42AM -0500, Eric Blau wrote:
> >
> > The behavior exists in 4.19.8 and 4.19.11, the kernel versions I have
> > upgraded to with Arch Linux, so the regression was introduced sometime
> > between 4.19.4 and 4.19.8. Hibernate still works but when I resume
> > from hibernate, there is a ksoftirqd and kworker thread/process
> > together taking up 100% of one core. If I turn off auto power control
> > for usb1 and usb2, the threads stop spinning. i.e.,
> >
> > echo 'on' > '/sys/bus/usb/devices/usb1/power/control
> >
> > Any suggestions as to where this regression was introduced and what
> > can be done to fix it?
>
> Sorry, this is a known issue, will be fixed in the next 4.19 release
> that should be out next week.
>
> If you are curious, it is fixed by commit 45f750c16cae ("xhci: Don't
> prevent USB2 bus suspend in state check intended for USB3 only") in
> Linus's tree.
Hi Greg,
I've upgraded to 4.20 and the same regression still exists. I know
this is not a stable release currently, but 4.20 has 45f750c16cae
merged as commit 93a86395b429:
commit 93a86395b429c3a68a0d029f584f39890c0801b2
Merge: 45f750c16cae 28a86092b175
Author: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
AuthorDate: Fri Dec 14 17:06:09 2018 +0100
Commit: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
CommitDate: Fri Dec 14 17:06:09 2018 +0100
Merge tag 'usb-serial-4.20-rc7' of
https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into
usb-linus
The same workaround is still effective, but I thought I'd let you know
that I'm still experiencing the same issue. If there's anything else I
can do to help track this down, please let me know.
Thanks,
Eric
