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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2013-01-17 16:46:54 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-01-18 16:59:20 +0100 |
| commit | cf139388ad5b39228793f34eea99e0ea9a2924aa (patch) | |
| tree | 1ecd1a445ec24aee7a9d3d013ff4257f7ba2753b /hw | |
| parent | cd7fdfe59f4f965665dcd9868fe3764f5256d6aa (diff) | |
| download | qemu-cf139388ad5b39228793f34eea99e0ea9a2924aa.tar.gz qemu-cf139388ad5b39228793f34eea99e0ea9a2924aa.tar.bz2 qemu-cf139388ad5b39228793f34eea99e0ea9a2924aa.zip | |
dataplane: support viostor virtio-pci status bit setting
The viostor virtio-blk driver for Windows does not use the
VIRTIO_CONFIG_S_DRIVER bit. It only sets the VIRTIO_CONFIG_S_DRIVER_OK
bit.
The viostor driver refreshes the virtio-pci status byte sometimes while
the guest is running. We misinterpret 0x4 (VIRTIO_CONFIG_S_DRIVER_OK)
as an indication that virtio-blk-data-plane should be stopped since 0x2
(VIRTIO_CONFIG_S_DRIVER) is missing. The result is that the device
becomes unresponsive.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/virtio-blk.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index df57b35f1b..34913ee40e 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -571,7 +571,8 @@ static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status) uint32_t features; #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE - if (s->dataplane && !(status & VIRTIO_CONFIG_S_DRIVER)) { + if (s->dataplane && !(status & (VIRTIO_CONFIG_S_DRIVER | + VIRTIO_CONFIG_S_DRIVER_OK))) { virtio_blk_data_plane_stop(s->dataplane); } #endif |