PCI/LINK: Disable bandwidth notification interrupt during suspend

If the bandwidth notification interrupt is left unmasked when entering
suspend to idle, it triggers immediately bringing the system back to
working state.

To keep that from happening, disable the interrupt when entering system
sleep and enable it again during resume.

Reported-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/pcie/bw_notification.c b/drivers/pci/pcie/bw_notification.c
index d2eae3b..971eb7e 100644 (file)
--- a/drivers/pci/pcie/bw_notification.c
+++ b/drivers/pci/pcie/bw_notification.c
@@ -96,11 +96,25 @@ static void pcie_bandwidth_notification_remove(struct pcie_device *srv)
        free_irq(srv->irq, srv);
 }
 
+static int pcie_bandwidth_notification_suspend(struct pcie_device *srv)
+{
+       pcie_disable_link_bandwidth_notification(srv->port);
+       return 0;
+}
+
+static int pcie_bandwidth_notification_resume(struct pcie_device *srv)
+{
+       pcie_enable_link_bandwidth_notification(srv->port);
+       return 0;
+}
+
 static struct pcie_port_service_driver pcie_bandwidth_notification_driver = {
        .name           = "pcie_bw_notification",
        .port_type      = PCIE_ANY_PORT,
        .service        = PCIE_PORT_SERVICE_BWNOTIF,
        .probe          = pcie_bandwidth_notification_probe,
+       .suspend        = pcie_bandwidth_notification_suspend,
+       .resume         = pcie_bandwidth_notification_resume,
        .remove         = pcie_bandwidth_notification_remove,
 };