Jason Wang a72caae218 virtio: correct the memory barrier in virtqueue_kick_prepare() ...

Use virtio_mb() to make sure the available index to be exposed before
checking the the avail event. Otherwise we may get stale value of
avail event in guest and never kick the host after.

Note: this fixes a bug introduced by ee7cd8981e15bcb365fc762afe3fc47b8242f630.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org

2012-01-28 08:10:23 +10:30

..

config.c

Virtio interface

2007-10-23 15:49:54 +10:00

Kconfig

virtio: add HAS_IOMEM dependency to MMIO platform bus driver

2011-11-24 13:04:47 +10:30

Makefile

virtio: Add platform bus driver for memory mapped virtio device

2011-11-02 11:41:01 +10:30

virtio_balloon.c

virtio: balloon: Add freeze, restore handlers to support S4

2012-01-12 15:44:47 +10:30

virtio_mmio.c

virtio: harsher barriers for rpmsg.

2012-01-12 15:44:42 +10:30

virtio_pci.c

virtio: pci: add PM notification handlers for restore, freeze, thaw, poweroff

2012-01-12 15:44:44 +10:30

virtio_ring.c

virtio: correct the memory barrier in virtqueue_kick_prepare()

2012-01-28 08:10:23 +10:30

virtio.c

virtio: Add module.h to drivers/virtio users.

2011-10-31 19:32:14 -04:00