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authorXie Yongji <xieyongji@bytedance.com>2021-08-31 18:36:26 +0800
committerMichael S. Tsirkin <mst@redhat.com>2021-09-06 07:20:57 -0400
commit0686082dbf7a204ca0fab326a820779e31666639 (patch)
tree889a7e8628defb413e7863264a62781869e1332c /drivers/vhost/vdpa.c
parent86e17a51c1a5a299009f8b1645e3e9da0d59faae (diff)
vdpa: Add reset callback in vdpa_config_ops
This adds a new callback to support device specific reset behavior. The vdpa bus driver will call the reset function instead of setting status to zero during resetting. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Link: https://lore.kernel.org/r/20210831103634.33-6-xieyongji@bytedance.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost/vdpa.c')
-rw-r--r--drivers/vhost/vdpa.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 42c998c82102..5562258f6238 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 ret, nvqs = v->nvqs;
u16 i;
if (copy_from_user(&status, statusp, sizeof(status)))
@@ -172,7 +172,12 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
if (status != 0 && (ops->get_status(vdpa) & ~status) != 0)
return -EINVAL;
- ops->set_status(vdpa, status);
+ if (status == 0) {
+ ret = ops->reset(vdpa);
+ if (ret)
+ return ret;
+ } else
+ ops->set_status(vdpa, status);
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) && !(status_old & VIRTIO_CONFIG_S_DRIVER_OK))
for (i = 0; i < nvqs; i++)