Drivers: hv: vmbus: Resume after fixing up old primary channels

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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@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Dexuan Cui 2019-09-05 23:01:22 +00:00 • committed by Sasha Levin

parent b307b38962

commit d8bd2d442b

5 changed files with 101 additions and 20 deletions

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89

drivers/hv/channel_mgmt.c

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2

drivers/hv/connection.c

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14

drivers/hv/hyperv_vmbus.h

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17

drivers/hv/vmbus_drv.c

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3

include/linux/hyperv.h

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