summaryrefslogtreecommitdiffstats
path: root/drivers/lguest
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/lguest')
-rw-r--r--drivers/lguest/lguest_device.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 7a643a6..8080249 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -144,20 +144,26 @@ static u8 lg_get_status(struct virtio_device *vdev)
return to_lgdev(vdev)->desc->status;
}
+/* To notify on status updates, we (ab)use the NOTIFY hypercall, with the
+ * descriptor address of the device. A zero status means "reset". */
+static void set_status(struct virtio_device *vdev, u8 status)
+{
+ unsigned long offset = (void *)to_lgdev(vdev)->desc - lguest_devices;
+
+ /* We set the status. */
+ to_lgdev(vdev)->desc->status = status;
+ hcall(LHCALL_NOTIFY, (max_pfn<<PAGE_SHIFT) + offset, 0, 0);
+}
+
static void lg_set_status(struct virtio_device *vdev, u8 status)
{
BUG_ON(!status);
- to_lgdev(vdev)->desc->status = status;
+ set_status(vdev, status);
}
-/* To reset the device, we (ab)use the NOTIFY hypercall, with the descriptor
- * address of the device. The Host will zero the status and all the
- * features. */
static void lg_reset(struct virtio_device *vdev)
{
- unsigned long offset = (void *)to_lgdev(vdev)->desc - lguest_devices;
-
- hcall(LHCALL_NOTIFY, (max_pfn<<PAGE_SHIFT) + offset, 0, 0);
+ set_status(vdev, 0);
}
/*
OpenPOWER on IntegriCloud