diff options
| author | Asias He <asias@redhat.com> | 2013-04-03 14:17:38 +0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-04-08 14:09:54 -0700 |
| commit | dfd5d5692c7ddf27380511b80a3dc590acfc4eee (patch) | |
| tree | 482d5438c0e3f9ca191ad8ce1b9f447c15ee72cf /drivers/vhost/tcm_vhost.c | |
| parent | 4f7f46d32c9875004fae1d57ae3c02cc2e6cd6a3 (diff) | |
| download | lwn-dfd5d5692c7ddf27380511b80a3dc590acfc4eee.tar.gz lwn-dfd5d5692c7ddf27380511b80a3dc590acfc4eee.zip | |
tcm_vhost: Initialize vq->last_used_idx when set endpoint
This patch fixes guest hang when booting seabios and guest.
[ 0.576238] scsi0 : Virtio SCSI HBA
[ 0.616754] virtio_scsi virtio1: request:id 0 is not a head!
vq->last_used_idx is initialized only when /dev/vhost-scsi is
opened or closed.
vhost_scsi_open -> vhost_dev_init() -> vhost_vq_reset()
vhost_scsi_release() -> vhost_dev_cleanup -> vhost_vq_reset()
So, when guest talks to tcm_vhost after seabios does, vq->last_used_idx
still contains the old valule for seabios. This confuses guest.
Fix this by calling vhost_init_used() to init vq->last_used_idx when
we set endpoint.
Signed-off-by: Asias He <asias@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/vhost/tcm_vhost.c')
| -rw-r--r-- | drivers/vhost/tcm_vhost.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c index 6cda137bb208..c127731b4230 100644 --- a/drivers/vhost/tcm_vhost.c +++ b/drivers/vhost/tcm_vhost.c @@ -874,6 +874,7 @@ static int vhost_scsi_set_endpoint( /* Flushing the vhost_work acts as synchronize_rcu */ mutex_lock(&vq->mutex); rcu_assign_pointer(vq->private_data, vs_tpg); + vhost_init_used(vq); mutex_unlock(&vq->mutex); } ret = 0; |