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 <as...@redhat.com>
---
drivers/vhost/tcm_vhost.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index 43fb11e..5e3d4487 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -781,8 +781,9 @@ static int vhost_scsi_set_endpoint(
{
struct tcm_vhost_tport *tv_tport;
struct tcm_vhost_tpg *tv_tpg;
+ struct vhost_virtqueue *vq;
bool match = false;
- int index, ret;
+ int index, ret, i;
mutex_lock(&vs->dev.mutex);
/* Verify that ring has been setup correctly. */
@@ -826,6 +827,12 @@ static int vhost_scsi_set_endpoint(
if (match) {
memcpy(vs->vs_vhost_wwpn, t->vhost_wwpn,
sizeof(vs->vs_vhost_wwpn));
+ for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
+ vq = &vs->vqs[i];
+ mutex_lock(&vq->mutex);
+ vhost_init_used(vq);
+ mutex_unlock(&vq->mutex);
+ }
vs->vs_endpoint = true;
ret = 0;
} else {
--
1.8.1.4
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