> From: [email protected] [mailto:[email protected]]
> Sent: Tuesday, February 28, 2017 07:18
> To: [email protected]; [email protected];
> ...
> From: Dexuan Cui <[email protected]>
>
> If the daemon is NOT running at all, when we disable the util device from
> Hyper-V Manager (or sometimes the host can rescind a util device and then
> re-offer it), we'll hang in util_remove -> hv_kvp_deinit ->
> wait_for_completion(&release_event), because this code path doesn't run:
> hvt_op_release -> ... -> kvp_on_reset -> complete(&release_event).
>
> Due to this, we even can't reboot the VM properly.
>
> The patch tracks if the dev file is opened or not, and we only need to
> wait if it's opened.
>
> Fixes: 5a66fecbf6aa ("Drivers: hv: util: kvp: Fix a rescind processing issue")
>
> Signed-off-by: Dexuan Cui <[email protected]>
> ...
Please ignore this patch, since Vitaly posted a better fix instead.
Thanks,
-- Dexuan