Various VirtIO improvements

      PCI:
        - Properly handle interrupt fallback from MSIX to MSI to legacy.
          The host may not have sufficient resources to support MSIX,
          so we must be able to fallback to legacy interrupts.
        - Add interface to get the (sub) vendor and device IDs.
        - Rename flags to VTPCI_FLAG_* like other VirtIO drivers.
      Block:
        - No longer allocate vtblk_requests from separate UMA zone.
          malloc(9) from M_DEVBUF is sufficient. Assert segment counts
          at allocation.
        - More verbose error and debug messages.
      Network:
        - Remove stray write once variable.
      Virtqueue:
        - Shuffle code around in preparation of converting the mb()s to
          the appropriate atomic(9) operations.
        - Only walk the descriptor chain when freeing if INVARIANTS is
          defined since the result is only KASSERT()ed.

Submitted by:	Bryan Venteicher (bryanv@daemoninthecloset.org)

1 files changed, 0 insertions, 1 deletions

diff --git a/sys/dev/virtio/balloon/virtio_balloon.c b/sys/dev/virtio/balloon/virtio_balloon.c
index d589a73..9b45459 100644
--- a/sys/dev/virtio/balloon/virtio_balloon.c
+++ b/sys/dev/virtio/balloon/virtio_balloon.c
@@ -412,7 +412,6 @@ vtballoon_send_page_frames(struct vtballoon_softc *sc, struct virtqueue *vq,
 	 * interrupt handler will wake us up.
 	 */
 	VTBALLOON_LOCK(sc);
-
 	while ((c = virtqueue_dequeue(vq, NULL)) == NULL)
 		msleep_spin(sc, VTBALLOON_MTX(sc), "vtbspf", 0);
 	VTBALLOON_UNLOCK(sc);