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| author |   Xie Yongji <xieyongji@bytedance.com> | 2021-08-31 18:36:26 +0800 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2021-09-06 07:20:57 -0400 |
| commit | 0686082dbf7a204ca0fab326a820779e31666639 (patch) | |
| tree | 889a7e8628defb413e7863264a62781869e1332c /drivers/vhost | |
| parent | vdpa: Fix some coding style issues (diff) | |
| download | linux-dev-0686082dbf7a204ca0fab326a820779e31666639.tar.xz linux-dev-0686082dbf7a204ca0fab326a820779e31666639.zip | |
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')
| -rw-r--r-- | drivers/vhost/vdpa.c | 9 |
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++) |