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Dexuan Cui authored
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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