Messages in this thread | | | From | Dexuan Cui <> | Subject | RE: [PATCH 1/1] Drivers: hv: util: on deinit, don't wait the release event, if we shouldn't | Date | Wed, 1 Mar 2017 14:31:36 +0000 |
| |
> From: kys@exchange.microsoft.com [mailto:kys@exchange.microsoft.com] > Sent: Tuesday, February 28, 2017 07:18 > To: gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org; > ... > From: Dexuan Cui <decui@microsoft.com> > > 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@microsoft.com> > ...
Please ignore this patch, since Vitaly posted a better fix instead.
Thanks, -- Dexuan
| |