linux-kernel - [RFC PATCH 09/10] vhost/vdpa: use get_config_size callback in vhost_vdpa_config

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Message-Id: <20210216094454.82106-10-sgarzare@redhat.com>
Date:   Tue, 16 Feb 2021 10:44:53 +0100
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     virtualization@...ts.linux-foundation.org
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>
Subject: [RFC PATCH 09/10] vhost/vdpa: use get_config_size callback in vhost_vdpa_config_validate()

Let's use the new 'get_config_size()' callback available instead of
using the 'virtio_id' to get the size of the device config space.

Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
---
 drivers/vhost/vdpa.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 544f8582a42b..21eea2be5afa 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -188,13 +188,8 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
 static ssize_t vhost_vdpa_config_validate(struct vhost_vdpa *v,
 					  struct vhost_vdpa_config *c)
 {
-	u32 size = 0;
-
-	switch (v->virtio_id) {
-	case VIRTIO_ID_NET:
-		size = sizeof(struct virtio_net_config);
-		break;
-	}
+	struct vdpa_device *vdpa = v->vdpa;
+	u32 size = vdpa->config->get_config_size(vdpa);
 
 	if (c->len == 0)
 		return -EINVAL;
-- 
2.29.2