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Subject[PATCH RFC v2 07/10] vdpa: Remove the restriction that only supports virtio-net devices
Date
From: Xie Yongji <xieyongji@bytedance.com>

With VDUSE, we should be able to support all kinds of virtio devices.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
---
drivers/vhost/vdpa.c | 28 ++--------------------------
1 file changed, 2 insertions(+), 26 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index ef688c8c0e0e..28624cbfe6dd 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -185,26 +185,6 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
return 0;
}

-static int vhost_vdpa_config_validate(struct vhost_vdpa *v,
- struct vhost_vdpa_config *c)
-{
- long size = 0;
-
- switch (v->virtio_id) {
- case VIRTIO_ID_NET:
- size = sizeof(struct virtio_net_config);
- break;
- }
-
- if (c->len == 0)
- return -EINVAL;
-
- if (c->len > size - c->off)
- return -E2BIG;
-
- return 0;
-}
-
static long vhost_vdpa_get_config(struct vhost_vdpa *v,
struct vhost_vdpa_config __user *c)
{
@@ -215,7 +195,7 @@ static long vhost_vdpa_get_config(struct vhost_vdpa *v,

if (copy_from_user(&config, c, size))
return -EFAULT;
- if (vhost_vdpa_config_validate(v, &config))
+ if (config.len == 0)
return -EINVAL;
buf = kvzalloc(config.len, GFP_KERNEL);
if (!buf)
@@ -243,7 +223,7 @@ static long vhost_vdpa_set_config(struct vhost_vdpa *v,

if (copy_from_user(&config, c, size))
return -EFAULT;
- if (vhost_vdpa_config_validate(v, &config))
+ if (config.len == 0)
return -EINVAL;

buf = vmemdup_user(c->buf, config.len);
@@ -1021,10 +1001,6 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)
int minor;
int r;

- /* Currently, we only accept the network devices. */
- if (ops->get_device_id(vdpa) != VIRTIO_ID_NET)
- return -ENOTSUPP;
-
v = kzalloc(sizeof(*v), GFP_KERNEL | __GFP_RETRY_MAYFAIL);
if (!v)
return -ENOMEM;
--
2.29.2
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