Re: [PATCH RESEND] usb: dwc3: tell xHCI that it lost its state when the core is powered off

[Joonhoe Kim <26rote@gmail.com>]

On Thu, 12 Nov 2026 12:00:08 +0000, sashiko-bot@kernel.org wrote:
> [Severity: Medium]
> Does the DWC3_GCTL_PRTCAP_OTG case in dwc3_suspend_common() also need to
> set dwc->xhci_power_lost?
[...]
> [Severity: High]
> This problem wasn't introduced by this patch, but in OTG host mode
> does dwc3_suspend_common() power off the core via
> dwc3_core_exit() without telling xhci-plat that power was lost?

Yes, both are the same gap. The OTG case always powers the core off for
system suspend, so v2 sets the flag there too when the host role is
active. OTG mode is not tested; this board switches roles through
usb-role-switch and never runs in DWC3_GCTL_PRTCAP_OTG.

> [Severity: Medium]
> Can dwc->xhci_power_lost remain 1 after resume and cause an unnecessary
> xHCI reset on a later aborted suspend?

Yes. v2 clears the flag in the resume quirk once xhci-plat has read it.

v2: https://lore.kernel.org/all/20261112141512.1840-1-26rote@gmail.com/

Thanks,
Joonhoe Kim