Re: [PATCH v2] vhci_hcd: USB port can get stuck in the disabled state

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On 7/30/21 5:52 PM, Michael wrote:
Yes i think just adding the VDEV_ST_USED check in addition to the
VDEV_ST_NOT_ASSIGNED state is fine and would fix the issue.


Can you please confirm if this works?

After many years of writing virtualhere (a similar system to usb/ip
but cross-platform and different non-kernel way of doing it server
side) I've seen many drivers that issue reset at any time. Loading
firmware is usually the reason.  Also sometimes switching
configurations requires a reset also, for example some gaming wheels
do this. I don't think you should make this VDEV_ST_USED check
specific to Wifi devices, as a lot of devices don't follow too closely
to the USB protocol to begin with from my experience. They primarily
base their USB interactions assuming the windows platform and its
quirks.


When sending responses to Linux kernel mailing lists, please use bottom post.
This check will be used for all drivers. We don't add checks for specific cases
in the code.

thanks,
-- Shuah




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