PCI: hv: Do not wait forever on a device that has disappeared

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Before the guest finishes the device initialization, the device can be
removed anytime by the host, and after that the host won't respond to
the guest's request, so the guest should be prepared to handle this
case.

Add a polling mechanism to detect device presence.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
[lorenzo.pieralisi@arm.com: edited commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>

...

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Dexuan Cui 2018-05-23 21:12:01 +00:00 • committed by Lorenzo Pieralisi

parent 5b8db8f66e

commit c3635da2a3

1 changed files with 34 additions and 12 deletions

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drivers/pci/host/pci-hyperv.c

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