virtnet_send_command() sends a command to the control virtqueue
by adding the command to the virtqueue, kicking the queue and waiting
in a loop.
The vdpa simulator simulates the control virqueue using a work queue:
the virqueue_kick() calls schedule_work() to start the queue processing.
But as virtnet_send_command() uses a loop, the scheduler cannot schedule
the workqueue and the virtqueue is never processed (and the command
never executed).
To fix that, replace in the loop the cpu_relax() by a schedule().
Signed-off-by: Laurent Vivier <lviv...@redhat.com>
---
drivers/net/virtio_net.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 29b3cc72082d..546c0b2baaca 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2011,7 +2011,7 @@ static bool virtnet_send_command(struct virtnet_info *vi,
u8 class, u8 cmd,
while (!virtqueue_get_buf(vi->cvq, &tmp) &&
!virtqueue_is_broken(vi->cvq) &&
!time_after(jiffies, timeout))
- cpu_relax();
+ schedule();
return vi->ctrl->status == VIRTIO_NET_OK;
}
--
2.39.0
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