On 28.10.2024 4.53, Kuangyi Chiang wrote:
Sometimes the hub driver does not recognize the USB device connected
to the external USB2.0 hub when the system resumes from S4.
After the SetPortFeature(PORT_RESET) request is completed, the hub
driver calls the HCD reset_device callback, which will issue a Reset
Device command and free all structures associated with endpoints
that were disabled.
This happens when the xHCI driver issue a Reset Device command to
inform the Etron xHCI host that the USB device associated with a
device slot has been reset. Seems that the Etron xHCI host can not
perform this command correctly, affecting the USB device.
To work around this, the xHCI driver should obtain a new device slot
with reference to commit 651aaf36a7d7 ("usb: xhci: Handle USB transaction
error on address command"), which is another way to inform the Etron
xHCI host that the USB device has been reset.
Add a new XHCI_ETRON_HOST quirk flag to invoke the workaround in
xhci_discover_or_reset_device().
Fixes: 2a8f82c4ceaf ("USB: xhci: Notify the xHC when a device is reset.")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Kuangyi Chiang <ki.chiang65@xxxxxxxxx>
Ok, I see, this patch depends on previous one, that's why it had the tags
Added this as well
Thanks
Mathias
