Re-read the device status to ensure it's set to zero during
resetting. Otherwise, fail the vhost_vdpa_set_status() after timeout.
Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
---
drivers/vhost/vdpa.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index bb374a801bda..62b6d911c57d 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -157,7 +157,7 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
struct vdpa_device *vdpa = v->vdpa;
const struct vdpa_config_ops *ops = vdpa->config;
u8 status, status_old;
- int nvqs = v->nvqs;
+ int timeout = 0, nvqs = v->nvqs;
u16 i;
if (copy_from_user(&status, statusp, sizeof(status)))
@@ -173,6 +173,15 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
return -EINVAL;
ops->set_status(vdpa, status);
+ if (status == 0) {
+ while (ops->get_status(vdpa)) {
+ timeout += 20;
+ if (timeout > VDPA_RESET_TIMEOUT_MS)
+ return -EIO;
+
+ msleep(20);
+ }
+ }
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) && !(status_old & VIRTIO_CONFIG_S_DRIVER_OK))
for (i = 0; i < nvqs; i++)
--
2.11.0
