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Stefano Stabellini
68c2c39a76
PV on HVM guests map GSIs into event channels. At restore time the event channels are resumed by restore_pirqs. Device drivers might try to register the same GSI again through ACPI at restore time, but the GSI has already been mapped and bound by restore_pirqs. This patch detects these situations and avoids mapping the same GSI multiple times. Without this patch we get: (XEN) irq.c:2235: dom4: pirq 23 or emuirq 28 already mapped and waste a pirq. CC: [email protected] Signed-off-by: Stefano Stabellini <[email protected]> Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>