> From: kys@xxxxxxxxxxxxxxxxxxxxxx [mailto:kys@xxxxxxxxxxxxxxxxxxxxxx] > Sent: Tuesday, February 28, 2017 07:18 > To: gregkh@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > ... > From: Dexuan Cui <decui@xxxxxxxxxxxxx> > > 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 <decui@xxxxxxxxxxxxx> > ... Please ignore this patch, since Vitaly posted a better fix instead. Thanks, -- Dexuan _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
