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SubjectRe: thunderbolt: Warning and 20 second delay in S4
On Fri, Jul 9, 2021 at 11:34 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Fri, Jul 09, 2021 at 02:31:35PM -0700, Evan Green wrote:
> > Hi Mika et al,
> >
> > I'm experimenting with suspending to disk (hibernate) on a Tigerlake
> > Chromebook running the chromeos-5.4 kernel. I don't have any USB4
> > peripherals plugged in. I'm getting this warning, along with a 20
> > second stall, both when going down for hibernate and coming back up.
>
> 5.4 is pretty old, especially for thunderbolt issues, can you try 5.13
> please?

Good idea. On 5.13.0-next-20210709, I see the warning and delay even
at boot when runtime pm kicks in. This should make for an easier repro
at least:

[ 18.832016] thunderbolt 0000:00:0d.2: 0: timeout reading config
space 2 from 0x6
[ 18.840309] ------------[ cut here ]------------
[ 18.845466] thunderbolt 0000:00:0d.2: interrupt for RX ring 0 is
already disabled
[ 18.853836] WARNING: CPU: 0 PID: 5 at drivers/thunderbolt/nhi.c:103
ring_interrupt_active+0x1b7/0x1da
...
[ 18.977736] CPU: 0 PID: 5 Comm: kworker/0:0 Tainted: G U
5.13.0-next-20210709 #18
[ 18.996804] Workqueue: pm pm_runtime_work
[ 19.001285] RIP: 0010:ring_interrupt_active+0x1b7/0x1da
...
[ 19.100302] Call Trace:
[ 19.103031] tb_ring_stop+0x9d/0x17d
[ 19.107022] tb_ctl_stop+0x33/0xa0
[ 19.110822] tb_domain_runtime_suspend+0x35/0x3a
[ 19.115979] nhi_runtime_suspend+0x1f/0x4c
[ 19.120557] pci_pm_runtime_suspend+0x5a/0x173
[ 19.125533] ? pci_pm_restore_noirq+0x73/0x73
[ 19.130411] __rpm_callback+0x8a/0x10d
[ 19.134595] rpm_callback+0x22/0x74
[ 19.138489] ? pci_pm_restore_noirq+0x73/0x73
[ 19.143355] rpm_suspend+0x21e/0x514
[ 19.147355] pm_runtime_work+0x8a/0xa5
[ 19.151554] process_one_work+0x1b7/0x368
[ 19.156027] worker_thread+0x213/0x372
[ 19.160217] kthread+0x147/0x15f
[ 19.163827] ? pr_cont_work+0x58/0x58
[ 19.167928] ? kthread_blkcg+0x31/0x31
[ 19.172113] ret_from_fork+0x1f/0x30
[ 19.176105] ---[ end trace 438b7f20f6b4049d ]---

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