RE: [PATCH v4 12/12] Drivers: hv: vmbus: Resume after fixing up old primary channels

[Michael Kelley]

From: Dexuan Cui <decui@xxxxxxxxxxxxx> Sent: Monday, September 2, 2019 5:23 PM
> 
> When the host re-offers the primary channels upon resume, the host only
> guarantees the Instance GUID  doesn't change, so vmbus_bus_suspend()
> should invalidate channel->offermsg.child_relid and figure out the
> number of primary channels that need to be fixed up upon resume.
> 
> Upon resume, vmbus_onoffer() finds the old channel structs, and maps
> the new offers to the old channels, and fixes up the old structs,
> and finally the resume callbacks of the VSC drivers will re-open
> the channels.
> 
> Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
> ---
>  drivers/hv/channel_mgmt.c | 85 ++++++++++++++++++++++++++++++++++++-----------
>  drivers/hv/connection.c   |  2 ++
>  drivers/hv/hyperv_vmbus.h | 14 ++++++++
>  drivers/hv/vmbus_drv.c    | 17 ++++++++++
>  include/linux/hyperv.h    |  3 ++
>  5 files changed, 101 insertions(+), 20 deletions(-)
> 

Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>